151
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Lou C, Wang X, Lv L, Li Z. Iron-Catalyzed Ring-Opening Reactions of Cyclopropanols with Alkenes and TBHP: Synthesis of 5-Oxo Peroxides. Org Lett 2021; 23:7608-7612. [PMID: 34528812 DOI: 10.1021/acs.orglett.1c02824] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The ring opening of cyclopropanols is rarely used in multicomponent reactions. Herein we report the three-component reaction of cyclopropanols with alkenes and tert-butyl hydroperoxide (TBHP) catalyzed by an iron catalyst. This protocol enables the incorporation of both the β-carbonyl fragment and a peroxy unit across the C═C double bond regioselectively, thus allowing an efficient, facile access to 5-oxo peroxides. Modification of the biologically active molecules and various downstream derivatizations of the peroxides are also demonstrated.
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Affiliation(s)
- Chenhao Lou
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Xin Wang
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Leiyang Lv
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Zhiping Li
- Department of Chemistry, Renmin University of China, Beijing 100872, China
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152
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Liu S, Qian H, Zhang T, Xie H, Han Z, Guo W, Huang H, Sun J. Mild Intermolecular Synthesis of a Cyclopropane‐Containing Tricyclic Skeleton: Unusual Reactivity of Isobenzopyryliums. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shuxuan Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Hui Qian
- Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China
| | - Tianyu Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Hongling Xie
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Zhengyu Han
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Wengang Guo
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Changzhou University Changzhou China
- Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China
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153
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Liu S, Qian H, Zhang T, Xie H, Han Z, Guo W, Huang H, Sun J. Mild Intermolecular Synthesis of a Cyclopropane-Containing Tricyclic Skeleton: Unusual Reactivity of Isobenzopyryliums. Angew Chem Int Ed Engl 2021; 60:21272-21276. [PMID: 34342934 DOI: 10.1002/anie.202108258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 08/02/2021] [Indexed: 11/05/2022]
Abstract
Cyclopropanes embedded in a polycyclic bridged architecture are a versatile structural motif, but such complex frameworks often impose substantial synthetic challenges. Herein we introduce a new approach for the expedient access to such spring-loaded strained systems via an exceptionally mild intermolecular convergent process between the readily available isobenzopyryliums and vinyl boronic acids. Different from the typical conventional approaches, our protocol does not involve the highly active carbenoid intermediates or strong conditions in order to overcome the disfavored kinetic and thermodynamic problems. Instead, the key cyclopropane ring was formed between the well-positioned nucleophile and electrophile in the adduct from the regioselective [4+2] cycloaddition. Thus, this unusual process also represents a new reactivity of the versatile isobenzopyryliums. The choice of a Brønsted acid catalyst with proper acidity is crucial to the high efficiency and selectivity for this multiple bond-forming process. The strained products are precursors to other useful synthetic building blocks.
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Affiliation(s)
- Shuxuan Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Hui Qian
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Tianyu Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Hongling Xie
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Zhengyu Han
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Wengang Guo
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
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154
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Howie RA, Elliott LD, Kayal S, Sun XZ, Hanson-Heine MWD, Hunter J, Clark CA, Love A, Wiseall C, Lee DS, Poliakoff M, Booker Milburn KI, George MW. Integrated Multistep Photochemical and Thermal Continuous Flow Reactions: Production of Bicyclic Lactones with Kilogram Productivity. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rowena A. Howie
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Luke D. Elliott
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Surajit Kayal
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Xue-Zhong Sun
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | | | - Jonathan Hunter
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Charlotte A. Clark
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Ashley Love
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Christopher Wiseall
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Darren S. Lee
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Martyn Poliakoff
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | | | - Michael W. George
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
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155
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Abstract
Peyssonnoside A is a marine-derived sulfated diterpenoid glucoside with a unique 5/6/3/6 tetracyclic skeleton with a highly substituted cyclopropane ring deeply embedded into the structure. Herein, we report the first total synthesis of this natural product in a concise, efficient, scalable, and highly diastereoselective fashion. The aglucone peyssonnosol was synthesized in 21% overall yield after 15 steps, featuring a Simmons-Smith cyclopropanation and Mukaiyama hydration, fully controlled by the spatial structure of the substrates.
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Affiliation(s)
- Gleb A Chesnokov
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Karl Gademann
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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156
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Planas F, Costantini M, Montesinos-Magraner M, Himo F, Mendoza A. Combined Experimental and Computational Study of Ruthenium N-Hydroxyphthalimidoyl Carbenes in Alkene Cyclopropanation Reactions. ACS Catal 2021; 11:10950-10963. [PMID: 34504736 PMCID: PMC8419840 DOI: 10.1021/acscatal.1c02540] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 08/05/2021] [Indexed: 01/14/2023]
Abstract
A combined experimental-computational approach has been used to study the cyclopropanation reaction of N-hydroxyphthalimide diazoacetate (NHPI-DA) with various olefins, catalyzed by a ruthenium-phenyloxazoline (Ru-Pheox) complex. Kinetic studies show that the better selectivity of the employed redox-active NHPI diazoacetate is a result of a much slower dimerization reaction compared to aliphatic diazoacetates. Density functional theory calculations reveal that several reactions can take place with similar energy barriers, namely, dimerization of the NHPI diazoacetate, cyclopropanation (inner-sphere and outer-sphere), and a previously unrecognized migratory insertion of the carbene into the phenyloxazoline ligand. The calculations show that the migratory insertion reaction yields an unconsidered ruthenium complex that is catalytically competent for both the dimerization and cyclopropanation, and its relevance is assessed experimentally. The stereoselectivity of the reaction is argued to stem from an intricate balance between the various mechanistic scenarios.
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Affiliation(s)
| | | | - Marc Montesinos-Magraner
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Abraham Mendoza
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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157
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K. Pagire S, Kumagai N, Shibasaki M. Highly Enantio- and Diastereoselective Synthesis of 1,2,3-Trisubstituted Cyclopropanes from α,β-Unsaturated Amides and Stabilized Sulfur Ylides Catalyzed by a Chiral Copper(I) Complex. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02723] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Santosh K. Pagire
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Naoya Kumagai
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
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158
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Chloro(4-methylpent-3-en-1-ynyl)carbene: IR spectrum, structure, photochemical transformations, and reactions with alkenes. Russ Chem Bull 2021. [DOI: 10.1007/s11172-021-3254-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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159
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Neveselý T, Wienhold M, Molloy JJ, Gilmour R. Advances in the E → Z Isomerization of Alkenes Using Small Molecule Photocatalysts. Chem Rev 2021; 122:2650-2694. [PMID: 34449198 DOI: 10.1021/acs.chemrev.1c00324] [Citation(s) in RCA: 147] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Geometrical E → Z alkene isomerization is intimately entwined in the historical fabric of organic photochemistry and is enjoying a renaissance (Roth et al. Angew. Chem., Int. Ed. Engl. 1989 28, 1193-1207). This is a consequence of the fundamental stereochemical importance of Z-alkenes, juxtaposed with frustrations in thermal reactivity that are rooted in microscopic reversibility. Accessing excited state reactivity paradigms allow this latter obstacle to be circumnavigated by exploiting subtle differences in the photophysical behavior of the substrate and product chromophores: this provides a molecular basis for directionality. While direct irradiation is operationally simple, photosensitization via selective energy transfer enables augmentation of the alkene repertoire to include substrates that are not directly excited by photons. Through sustained innovation, an impressive portfolio of tailored small molecule catalysts with a range of triplet energies are now widely available to facilitate contra-thermodynamic and thermo-neutral isomerization reactions to generate Z-alkene fragments. This review is intended to serve as a practical guide covering the geometric isomerization of alkenes enabled by energy transfer catalysis from 2000 to 2020, and as a logical sequel to the excellent treatment by Dugave and Demange (Chem. Rev. 2003 103, 2475-2532). The mechanistic foundations underpinning isomerization selectivity are discussed together with induction models and rationales to explain the counterintuitive directionality of these processes in which very small energy differences distinguish substrate from product. Implications for subsequent stereospecific transformations, application in total synthesis, regioselective polyene isomerization, and spatiotemporal control of pre-existing alkene configuration in a broader sense are discussed.
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Affiliation(s)
- Tomáš Neveselý
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - Max Wienhold
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - John J Molloy
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - Ryan Gilmour
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Münster, Germany
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160
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Yang S, Jiang WT, Xiao B. Tertiary cyclopropyl carbagermatranes: synthesis and cross-coupling. Chem Commun (Camb) 2021; 57:8143-8146. [PMID: 34318815 DOI: 10.1039/d1cc02930d] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The construction of the cyclopropyl quaternary carbon center can afford a series of 1,1-olefin bioisosteres. Here, we report tertiary cyclopropyl carbagermatranes, which can be easily obtained by the zinc-mediated decarboxylation of NHP esters. In addition, they exhibit efficient reactivity in the palladium-catalyzed cross-coupling reaction and orthogonal reactivity with boron reagents, therefore acting as robust nucleophiles for the synthesis of tertiary cyclopropane and efficient intermediates for the formation of quaternary centers.
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Affiliation(s)
- Shuo Yang
- University of Science and Technology of China, Hefei 230026, P. R. China.
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161
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Liu X, Liu J, Wu J, Li CC. Enantioselective Total Synthesis of Cerorubenic Acid-III via Type II [5+2] Cycloaddition Reaction. J Org Chem 2021; 86:11125-11139. [PMID: 33887910 DOI: 10.1021/acs.joc.1c00185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first enantioselective total synthesis of cerorubenic acid-III is described in detail. Different strategies and attempts, based on a type II [5+2] cycloaddition reaction, leading to the bicyclo[4.4.1] ring system with a strained bridgehead double bond, are depicted. Furthermore, sodium naphthalenide was found to be efficient in the chemoselective reduction of 8-oxabicyclo[3.2.1]octene, with three transformations completed in one operation. An unusual SN1 transannular cyclization reaction was applied to construct the synthetically challenging vinylcyclopropane moiety. This strategy enabled the total synthesis of cerorubenic acid-III in 19 steps.
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Affiliation(s)
- Xin Liu
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Junyang Liu
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.,Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jianlei Wu
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chuang-Chuang Li
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Shenzhen Grubbs Institute, Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
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162
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Abstract
The Pd-catalyzed carbon-carbon bond formation pioneered by Heck in 1969 has dominated medicinal chemistry development for the ensuing fifty years. As the demand for more complex three-dimensional active pharmaceuticals continues to increase, preparative enzyme-mediated assembly, by virtue of its exquisite selectivity and sustainable nature, is poised to provide a practical and affordable alternative for accessing such compounds. In this minireview, we summarize recent state-of-the-art developments in practical enzyme-mediated assembly of carbocycles. When appropriate, background information on the enzymatic transformation is provided and challenges and/or limitations are also highlighted.
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Affiliation(s)
- Weijin Wang
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, FL, 33458, USA
| | - Douglass F Taber
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, FL, 33458, USA
| | - Hans Renata
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
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163
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Su Y, Dong K, Zheng H, Doyle MP. Generation of Diazomethyl Radicals by Hydrogen Atom Abstraction and Their Cycloaddition with Alkenes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yong‐Liang Su
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Kuiyong Dong
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Haifeng Zheng
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Michael P. Doyle
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
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164
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Hirose A, Watanabe A, Ogino K, Nagatomo M, Inoue M. Unified Total Syntheses of Rhamnofolane, Tigliane, and Daphnane Diterpenoids. J Am Chem Soc 2021; 143:12387-12396. [PMID: 34319739 DOI: 10.1021/jacs.1c06450] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Rhamnofolane, tigliane, and daphnane diterpenoids are structurally complex natural products with multiple oxygen functionalities, making them synthetically challenging. While these diterpenoids share a 5/7/6-trans-fused ring system (ABC-ring), the three-carbon substitutions at the C13- and C14-positions on the C-ring and appending oxygen functional groups differ among them, accounting for the disparate biological activities of these natural products. Here, we developed a new, unified strategy for expeditious total syntheses of five representative members of these three families, crotophorbolone (1), langduin A (2), prostratin (3), resiniferatoxin (4), and tinyatoxin (5). Retrosynthetically, 1-5 were simplified into their common ABC-ring 6 by detaching the three-carbon units and the oxygen-appended groups. Intermediate 6 with six stereocenters was assembled from four achiral fragments in 12 steps by integrating three powerful transformations, as follows: (i) asymmetric Diels-Alder reaction to induce formation of the C-ring; (ii) π-allyl Stille coupling reaction to set the trisubstituted E-olefin of the B-ring; and (iii) Eu(fod)3-promoted 7-endo cyclization of the B-ring via the generation of a bridgehead radical. Then 6 was diversified into 1-5 by selective installation of the different functional groups. Attachment of the C14-β-isopropenyl and isopropyl groups led to 1 and 2, respectively, while oxidative acetoxylation and C13,14-β-dimethylcyclopropane formation gave rise to 3. Finally, formation of an α-oriented caged orthoester by C13-stereochemical inversion and esterification with two different homovanillic acids delivered 4 and 5 with a C13-β-isopropenyl group. This unified synthetic route to 1-5 required only 16-20 total steps, demonstrating the exceptional efficiency of the present strategy.
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Affiliation(s)
- Akira Hirose
- Graduate School of Pharmaceutical Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ayumu Watanabe
- Graduate School of Pharmaceutical Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kohei Ogino
- Graduate School of Pharmaceutical Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masanori Nagatomo
- Graduate School of Pharmaceutical Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masayuki Inoue
- Graduate School of Pharmaceutical Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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165
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Altarejos J, Sucunza D, Vaquero JJ, Carreras J. Enantioselective Copper-Catalyzed Synthesis of Trifluoromethyl-Cyclopropylboronates. Org Lett 2021; 23:6174-6178. [PMID: 34320310 PMCID: PMC8895459 DOI: 10.1021/acs.orglett.1c02420] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
A copper-catalyzed
enantioselective cyclopropanation involving
trifluorodiazoethane in the presence of alkenyl boronates has been
developed. This transformation enables the preparation of 2-substituted-3-(trifluoromethyl)cyclopropylboronates
with high levels of stereocontrol. The products are valuable synthetic
intermediates by transformation of the boronate group. This methodology
can be applied to the synthesis of novel trifluoromethylated analogues
of trans-2-arylcyclopropylamines, which are prevalent
motifs in biologically active compounds.
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Affiliation(s)
- Julia Altarejos
- Universidad de Alcalá, Departamento de Química Orgánica y Química Inorgánica,, Alcalá de Henares 28805, Spain.,Instituto de Investigación Química Andrés Manuel del Río (IQAR), Universidad de Alcalá, Alcalá de Henares 28805, Spain.,Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid 28034, Spain
| | - David Sucunza
- Universidad de Alcalá, Departamento de Química Orgánica y Química Inorgánica,, Alcalá de Henares 28805, Spain.,Instituto de Investigación Química Andrés Manuel del Río (IQAR), Universidad de Alcalá, Alcalá de Henares 28805, Spain.,Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid 28034, Spain
| | - Juan J Vaquero
- Universidad de Alcalá, Departamento de Química Orgánica y Química Inorgánica,, Alcalá de Henares 28805, Spain.,Instituto de Investigación Química Andrés Manuel del Río (IQAR), Universidad de Alcalá, Alcalá de Henares 28805, Spain.,Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid 28034, Spain
| | - Javier Carreras
- Universidad de Alcalá, Departamento de Química Orgánica y Química Inorgánica,, Alcalá de Henares 28805, Spain.,Instituto de Investigación Química Andrés Manuel del Río (IQAR), Universidad de Alcalá, Alcalá de Henares 28805, Spain.,Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid 28034, Spain
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166
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Russo TVC, Sá MM. One‐Pot Synthesis of α‐Diazo‐γ,δ‐unsaturated Esters as Versatile Building Blocks for Functionalized Dienes, Cyclopentenes, and 5,7‐Fused Bicycles. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Theo V. C. Russo
- Departamento de Química Universidade Federal de Santa Catarina Florianópolis SC 88040-900 Brazil
| | - Marcus M. Sá
- Departamento de Química Universidade Federal de Santa Catarina Florianópolis SC 88040-900 Brazil
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167
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Mato M, Montesinos-Magraner M, Sugranyes AR, Echavarren AM. Rh(II)-Catalyzed Alkynylcyclopropanation of Alkenes by Decarbenation of Alkynylcycloheptatrienes. J Am Chem Soc 2021; 143:10760-10769. [PMID: 34236835 PMCID: PMC8299462 DOI: 10.1021/jacs.1c05422] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Indexed: 12/15/2022]
Abstract
Alkynylcyclopropanes have found promising applications in both organic synthesis and medicinal chemistry but remain rather underexplored due to the challenges associated with their preparation. We describe a convenient two-step methodology for the alkynylcyclopropanation of alkenes, based on the rhodium(II)-catalyzed decarbenation of 7-alkynyl cycloheptatrienes. The catalytic system employed circumvents a fundamental problem associated with these substrates, which usually evolve via 6-endo-dig cyclization or ring-contraction pathways under metal catalysis. This unique performance unlocks a rapid access to a diverse library of alkynylcyclopropanes (including derivatives of complex drug-like molecules), versatile intermediates that previously required much lengthier synthetic approaches. Combining experiments and DFT calculations, the complete mechanistic picture for the divergent reactivity of alkynylcycloheptatrienes under metal catalysis has been unveiled, rationalizing the unique selectivity displayed by rhodium(II) complexes.
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Affiliation(s)
- Mauro Mato
- Institute
of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Avenida Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain
| | - Marc Montesinos-Magraner
- Institute
of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Avenida Països Catalans 16, 43007 Tarragona, Spain
| | - Arnau R. Sugranyes
- Institute
of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Avenida Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain
| | - Antonio M. Echavarren
- Institute
of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Avenida Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain
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168
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Su YL, Dong K, Zheng H, Doyle MP. Generation of Diazomethyl Radicals by Hydrogen Atom Abstraction and Their Cycloaddition with Alkenes. Angew Chem Int Ed Engl 2021; 60:18484-18488. [PMID: 34043866 DOI: 10.1002/anie.202105472] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/23/2021] [Indexed: 12/16/2022]
Abstract
A general catalytic methodology for the synthesis of pyrazolines from α-diazo compounds and conjugated alkenes is reported. The direct hydrogen atom transfer (HAT) process of α-diazo compounds promoted by the tert-butylperoxy radical generates electrophilic diazomethyl radicals, thereby reversing the reactivity of the carbon atom attached with the diazo group. The regiocontrolled addition of diazomethyl radicals to carbon-carbon double bonds followed by intramolecular ring closure on the terminal diazo nitrogen and tautomerization affords a diverse set of pyrazolines in good yields with excellent regioselectivity. This strategy overcomes the limitations of electron-deficient alkenes in traditional dipolar [3+2]-cycloaddition of α-diazo compounds with alkenes. Furthermore, the straightforward formation of the diazomethyl radicals provides umpolung reactivity, thus opening new opportunities for the versatile transformations of diazo compounds.
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Affiliation(s)
- Yong-Liang Su
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Kuiyong Dong
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Haifeng Zheng
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Michael P Doyle
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
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169
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Sun MR, Li HL, Ba MY, Cheng W, Zhu HL, Duan YT. Cyclopropyl Scaffold: A Generalist for Marketed Drugs. Mini Rev Med Chem 2021; 21:150-170. [PMID: 32727325 DOI: 10.2174/1389557520666200729161150] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 12/23/2019] [Accepted: 04/26/2020] [Indexed: 11/22/2022]
Abstract
In recent decades, much attention has been given to cyclopropyl scaffolds, which commonly exist in natural products and synthetic organic molecules. Clinical drug molecules with cyclopropyl rings are an area of focus in therapeutic research due to their interesting chemical properties and unique pharmacology activity. These molecular drugs against different targets are applicable in some therapeutic treatment fields including cancer, infection, respiratory disorder, cardiovascular and cerebrovascular diseases, dysphrenia, nervous system disorders, endocrine and metabolic disorders, skin disease, digestive disorders, urogenital diseases, otolaryngological and dental diseases, and eye diseases. This review is a guide for pharmacologists who are in search of valid preclinical/clinical drug compounds where the progress, from 1961 to the present day, of approved marketed drugs containing cyclopropyl scaffold is examined.
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Affiliation(s)
- Mo-Ran Sun
- School of Pharmaceutical Science, Zhengzhou University, Zhengzhou, Henan450001, China
| | - Hong-Liang Li
- School of Pharmaceutical Science, Zhengzhou University, Zhengzhou, Henan450001, China
| | - Meng-Yu Ba
- School of Pharmaceutical Science, Zhengzhou University, Zhengzhou, Henan450001, China
| | - Weyland Cheng
- Henan Provincial Key Laboratory of Children's Genetics and Metabolic Diseases, Children's Hospital Affiliated to Zhengzhou University, Zhengzhou Children's Hospital, Zhengzhou University, Zhengzhou 450018, China
| | - Hai-Liang Zhu
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, China
| | - Yong-Tao Duan
- Henan Provincial Key Laboratory of Children's Genetics and Metabolic Diseases, Children's Hospital Affiliated to Zhengzhou University, Zhengzhou Children's Hospital, Zhengzhou University, Zhengzhou 450018, China
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170
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Cao L, Luo J, Yao J, Wang D, Dong Y, Zheng C, Zhuo C. Molybdenum‐Catalyzed Deoxygenative Cyclopropanation of 1,2‐Dicarbonyl or Monocarbonyl Compounds. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Li‐Ya Cao
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
| | - Jian‐Nan Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
| | - Jia‐Sheng Yao
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
| | - De‐Ku Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
| | - Yuan‐Qing Dong
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 P. R. China
| | - Chun‐Xiang Zhuo
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
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171
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Zacharias AO, Mao JX, Nam K, Dias HVR. Copper(I) and silver(I) chemistry of vinyltrifluoroborate supported by a bis(pyrazolyl)methane ligand. Dalton Trans 2021; 50:7621-7632. [PMID: 33999090 DOI: 10.1039/d1dt00974e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although unsaturated organotrifluoroborates are common synthons in metal-organic chemistry, their transition metal complexes have received little attention. [CH2(3,5-(CH3)2Pz)2]Cu(CH2[double bond, length as m-dash]CHBF3), (SIPr)Cu(MeCN)(CH2[double bond, length as m-dash]CHBF3) and [CH2(3,5-(CH3)2Pz)2]Ag(CH2[double bond, length as m-dash]CHBF3) represent rare, isolable molecules featuring a vinyltrifluoroborate ligand on coinage metals. The X-ray crystal structures show the presence of three-coordinate metal sites in these complexes. The vinyltrifluoroborate group binds asymmetrically to the metal site in [CH2(3,5-(CH3)2Pz)2]M(CH2[double bond, length as m-dash]CHBF3) (M = Cu, Ag) with relatively closer M-C(H)2 distances. The computed structures of [CH2(3,5-(CH3)2Pz)2]M(CH2[double bond, length as m-dash]CHBF3) and M(CH2[double bond, length as m-dash]CHBF3), however, have shorter M-C(H)BF3 distances than M-C(H)2. These molecules feature various inter- or intra-molecular contacts involving fluorine of the BF3 group, possibly affecting these M-C distances. The binding energies of [CH2[double bond, length as m-dash]CHBF3]- to Cu+, Ag+ and Au+ have been calculated at the wB97XD/def2-TZVP level of theory, in the presence and absence of the supporting ligand CH2(3,5-(CH3)2Pz)2. The calculation shows that Au+ has the strongest binding to the [CH2[double bond, length as m-dash]CHBF3]- ligand, followed by Cu+ and Ag+, irrespective of the presence of the supporting ligand. However, in all three metals, the supporting ligand weakens the binding of olefin to the metal. The same trends were also found from the analysis of the σ-donation and π-backbonding interactions between the metal fragment and the π and π* orbitals of [CH2[double bond, length as m-dash]CHBF3]-.
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Affiliation(s)
- Adway O Zacharias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
| | - James X Mao
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
| | - Kwangho Nam
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
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172
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Cao LY, Luo JN, Yao JS, Wang DK, Dong YQ, Zheng C, Zhuo CX. Molybdenum-Catalyzed Deoxygenative Cyclopropanation of 1,2-Dicarbonyl or Monocarbonyl Compounds. Angew Chem Int Ed Engl 2021; 60:15254-15259. [PMID: 33901340 DOI: 10.1002/anie.202103429] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/21/2021] [Indexed: 12/26/2022]
Abstract
The transition-metal-catalyzed cyclopropanation of alkenes by the decomposition of diazo compounds is a powerful and straightforward strategy to produce cyclopropanes, but is tempered by the potentially explosive nature of diazo substrates. Herein we report the Mo-catalyzed regiospecific deoxygenative cyclopropanation of readily available and bench-stable 1,2-dicarbonyl compounds, in which one of the two carbonyl groups acts as a carbene equivalent upon deoxygenation and engages in the subsequent cyclopropanation process. The use of a commercially available Mo catalyst afforded an array of valuable cyclopropanes with exclusive regioselectivity in up to 90 % yield. The synthetic utility of this method was further demonstrated by gram-scale syntheses, late-stage functionalization, and the cyclopropanation of a simple monocarbonyl compound. Preliminary mechanistic studies suggest that phosphine (or silane) acts as both a mild reductant and a good oxygen acceptor that efficiently regenerates the catalytically active Mo catalyst through reduction of the Mo-oxo complexes.
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Affiliation(s)
- Li-Ya Cao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Jian-Nan Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Jia-Sheng Yao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - De-Ku Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Yuan-Qing Dong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, P. R. China
| | - Chun-Xiang Zhuo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
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173
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Yang Z, Tan Q, Jiang Y, Yang J, Su X, Qiao Z, Zhou W, He L, Qiu H, Zhang M. Asymmetric Total Synthesis of Sarpagine and Koumine Alkaloids. Angew Chem Int Ed Engl 2021; 60:13105-13111. [PMID: 33783073 DOI: 10.1002/anie.202102416] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/24/2021] [Indexed: 12/23/2022]
Abstract
We report here a concise, collective, and asymmetric total synthesis of sarpagine alkaloids and biogenetically related koumine alkaloids, which structurally feature a rigid cage scaffold, with L-tryptophan as the starting material. Two key bridged skeleton-forming reactions, namely tandem sequential oxidative cyclopropanol ring-opening cyclization and ketone α-allenylation, ensure concurrent assembly of the caged sarpagine scaffold and installation of requisite derivative handles. With a common caged intermediate as the branch point, by taking advantage of ketone and allene groups therein, total synthesis of five sarpagine alkaloids (affinisine, normacusine B, trinervine, Na -methyl-16-epipericyclivine, and vellosimine) with various substituents and three koumine alkaloids (koumine, koumimine, and N-demethylkoumine) with more complex cage scaffolds has been accomplished.
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Affiliation(s)
- Zhao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Qiuyuan Tan
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Yan Jiang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Jiaojiao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Xiaojiao Su
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Zhen Qiao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Wenqiang Zhou
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Ling He
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Hanyue Qiu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Min Zhang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
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174
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Yang Z, Tan Q, Jiang Y, Yang J, Su X, Qiao Z, Zhou W, He L, Qiu H, Zhang M. Asymmetric Total Synthesis of Sarpagine and Koumine Alkaloids. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102416] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Zhao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Qiuyuan Tan
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Yan Jiang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Jiaojiao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Xiaojiao Su
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Zhen Qiao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Wenqiang Zhou
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Ling He
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Hanyue Qiu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Min Zhang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
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175
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Devarahosahalli Veeranna K, Kanti Das K, Baskaran S. Reversal of polarity by catalytic SET oxidation: synthesis of azabicyclo[ m. n.0]alkanes via chemoselective reduction of amidines. Org Biomol Chem 2021; 19:4054-4059. [PMID: 33885121 DOI: 10.1039/d1ob00416f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A one-pot catalytic method has been developed for the stereoselective synthesis of cyclopropane-fused cyclic amidines using CuBr2/K2S2O8 as an efficient single electron transfer (SET) oxidative system. The generality of this mild method is demonstrated with a wide variety of substrates to furnish pharmaceutically important amidines containing aza-bicyclic and novel aza-tricyclic frameworks in very good yields. A chemoselective reduction of cyclic amidines to 2-/3-azabicyclo[m.n.0]alkanes and octahydroindoles has been developed using a NaBH4/I2 reagent system. The synthetic scope of the chemoselective reduction of the amidine functionality has been exemplified in the stereoselective synthesis of an iminosugar based (±)-epiquinamide analogue.
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Affiliation(s)
| | - Kanak Kanti Das
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India.
| | - Sundarababu Baskaran
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India.
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176
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Zhang Q, Yang Z, Wang Q, Liu S, Zhou T, Zhao Y, Zhang M. Asymmetric Total Synthesis of Hetidine-Type C 20-Diterpenoid Alkaloids: (+)-Talassimidine and (+)-Talassamine. J Am Chem Soc 2021; 143:7088-7095. [PMID: 33938219 DOI: 10.1021/jacs.1c01865] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Here, we report the first asymmetric total synthesis of (+)-talassimidine and (+)-talassamine, two hetidine-type C20-diterpenoid alkaloids. A highly regio- and diastereoselective 1,3-dipolar cycloaddition of an azomethine ylide yielded a chiral tetracyclic intermediate in high enantiopurity, thus providing the structural basis for asymmetric assembly of the hexacyclic hetidine skeleton. In this key step, the introduction of a single chiral center induces four new continuous chiral centers. Another key transformation is the dearomative cyclopropanation of the benzene ring and subsequent SN2-like ring opening of the resultant cyclopropane ring with water as a nucleophile, which not only establishes the B ring but also precisely installs the difficult-to-achieve equatorial C7-OH group.
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Affiliation(s)
- Quanzheng Zhang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Zhao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Qi Wang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Shuangwei Liu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Tao Zhou
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Yankun Zhao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Min Zhang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
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177
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Hao J, Miao W, Lu S, Cheng Y, Jia G, Li C. Controllable stereoinversion in DNA-catalyzed olefin cyclopropanation via cofactor modification. Chem Sci 2021; 12:7918-7923. [PMID: 34168845 PMCID: PMC8188488 DOI: 10.1039/d1sc00755f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 04/23/2021] [Indexed: 11/21/2022] Open
Abstract
The assembly of DNA with metal-complex cofactors can form promising biocatalysts for asymmetric reactions, although catalytic performance is typically limited by low enantioselectivities and stereo-control remains a challenge. Here, we engineer G-quadruplex-based DNA biocatalysts for an asymmetric cyclopropanation reaction, achieving enantiomeric excess (eetrans) values of up to +91% with controllable stereoinversion, where the enantioselectivity switches to -72% eetrans through modification of the Fe-porphyrin cofactor. Complementary circular dichroism, nuclear magnetic resonance, and fluorescence titration experiments show that the porphyrin ligand of the cofactor participates in the regulation of the catalytic enantioselectivity via a synergetic effect with DNA residues at the active site. These findings underline the important role of cofactor modification in DNA catalysis and thus pave the way for the rational engineering of DNA-based biocatalysts.
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Affiliation(s)
- Jingya Hao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Zhongshan Road 457 Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 101408 China
| | - Wenhui Miao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Zhongshan Road 457 Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 101408 China
| | - Shengmei Lu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Zhongshan Road 457 Dalian 116023 China
| | - Yu Cheng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Zhongshan Road 457 Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 101408 China
| | - Guoqing Jia
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Zhongshan Road 457 Dalian 116023 China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Zhongshan Road 457 Dalian 116023 China
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178
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Sarkar T, Talukdar K, Das BK, Shah TA, Debnath B, Punniyamurthy T. The transition-metal-catalyzed stereoselective ring-expansion of vinylaziridines and vinyloxiranes. Org Biomol Chem 2021; 19:3776-3790. [PMID: 33949586 DOI: 10.1039/d1ob00259g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The transition-metal-aided stereoselective construction of sp3-carbon-rich heterocyclic scaffolds using strained-ring systems has received considerable attention in recent years due to the prominent presence of these scaffolds in myriad natural products, bioactive molecules, and pharmaceutical components. In this area, the catalytic ring-enlargement of vinylaziridines and vinyloxiranes plays a predominant role when synthesizing high sp3-content biorelevant heterocyclic compounds. This article aims to portray recent advancements in the ring-expansion of vinylaziridines and vinyloxiranes for accessing densely functionalized stereoselective heterocycles that have been developed over the past five years, with an emphasis on the substrate scopes and mechanistic insights into the key methodologies, and it is arranged based on the transition metals used and the ring sizes of the heterocyclic scaffolds.
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Affiliation(s)
- Tanumay Sarkar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
| | - Kangkan Talukdar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
| | - Bijay Ketan Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
| | - Tariq A Shah
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India. and Government Srinagar Women's College, Zakura Srinagar 190006, India
| | - Bijoy Debnath
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
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179
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Pirovano V, Brambilla E, Riva M, Leoni S, Rizzato S, Garanzini D, Abbiati G, Rossi E. Stereoselective synthesis of 2-spirocyclopropyl-indolin-3-ones through cyclopropanation of aza-aurones with tosylhydrazones. Org Biomol Chem 2021; 19:3925-3931. [PMID: 33949577 DOI: 10.1039/d1ob00076d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A simple and efficient approach for the synthesis of 2-spirocyclopropyl-indolin-3-ones is herein described. The method involves a diasteroselective cyclopropanation of aza-aurones with tosylhydrazones, selected as versatile carbene sources, and represents a remarkable synthetic alternative to get access to this class of C2-spiropseudoindoxyl scaffolds. The reactions proceed in the presence of a base and catalytic amounts of benzyl triethylammonium chloride and well-tolerate a broad range of substituents on both aza-aurones and tosylhydrazones to afford a series of C2-spirocyclopropanated derivatives in high yields. In addition, selected functional group transformations of the final products were explored demonstrating the synthetic potential of these indole-based derivatives.
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Affiliation(s)
- Valentina Pirovano
- Dipartimento di Scienze Farmaceutiche, Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via G. Venezian 21, 20133, Milano, Italy.
| | - Elisa Brambilla
- Dipartimento di Scienze Farmaceutiche, Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via G. Venezian 21, 20133, Milano, Italy.
| | - Marika Riva
- Dipartimento di Scienze Farmaceutiche, Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via G. Venezian 21, 20133, Milano, Italy.
| | - Sara Leoni
- Dipartimento di Scienze Farmaceutiche, Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via G. Venezian 21, 20133, Milano, Italy.
| | - Silvia Rizzato
- Dipartimento di Chimica, Università degli Studi di Milano, Via C. Golgi 19, 20133, Milano, Italy
| | - Davide Garanzini
- Dipartimento di Scienze Farmaceutiche, Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via G. Venezian 21, 20133, Milano, Italy.
| | - Giorgio Abbiati
- Dipartimento di Scienze Farmaceutiche, Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via G. Venezian 21, 20133, Milano, Italy.
| | - Elisabetta Rossi
- Dipartimento di Scienze Farmaceutiche, Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via G. Venezian 21, 20133, Milano, Italy.
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180
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Mondal R, Agbaria M, Nairoukh Z. Fluorinated Rings: Conformation and Application. Chemistry 2021; 27:7193-7213. [PMID: 33512034 DOI: 10.1002/chem.202005425] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Indexed: 12/16/2022]
Abstract
The introduction of fluorine atoms into molecules and materials across many fields of academic and industrial research is now commonplace, owing to their unique properties. A particularly interesting feature is the impact of fluorine substitution on the relative orientation of a C-F bond when incorporated into organic molecules. In this Review, we will be discussing the conformational behavior of fluorinated aliphatic carbo- and heterocyclic systems. The conformational preference of each system is associated with various interactions introduced by fluorine substitution such as charge-dipole, dipole-dipole, and hyperconjugative interactions. The contribution of each interaction on the stabilization of the fluorinated alicyclic system, which manifests itself in low conformations, will be discussed in detail. The novelty of this feature will be demonstrated by presenting the most recent applications.
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Affiliation(s)
- Rajarshi Mondal
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel
| | - Mohamed Agbaria
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel
| | - Zackaria Nairoukh
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel
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181
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Silva LDSD, Souza AAD, Sá É. Computational considerations on the mechanism and stereoselectivity in cyclopropanation reactions via iron-carbenes. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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182
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Qiao X, Lin Y, Li J, Ma W, Zhao J. All at once arrangement of both oxygen atoms of dioxygen into aliphatic C(sp3)-C(sp3) bonds for hydroxyketone difunctionalization. Sci China Chem 2021. [DOI: 10.1007/s11426-020-9949-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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183
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Jin Y, Orihara K, Kawagishi F, Toma T, Fukuyama T, Yokoshima S. Total Synthesis of Haliclonin A. Angew Chem Int Ed Engl 2021; 60:9666-9671. [PMID: 33559237 DOI: 10.1002/anie.202016343] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/18/2021] [Indexed: 11/10/2022]
Abstract
The total synthesis of haliclonin A was accomplished. Starting from 3,5-dimethoxybenzoic acid, a functionalized cyclohexanone fused to a 17-membered ring was prepared through a Birch reduction/alkylation sequence, ring-closing metathesis, intramolecular cyclopropanation, and stereoselective 1,4-addition of an organocopper reagent to an enone moiety. Reductive C-N bond formation via an N,O-acetal forged the 3-azabicyclo[3.3.1]nonane core. The allyl alcohol moiety was constructed by a sequence involving stereoselective α-selenylation of an aldehyde via an enamine, syn-elimination of a selenoxide, and allylation of the aldehyde with an allylboronate. Formation of the 15-membered ring containing a skipped diene was achieved by ring-closing metathesis, and final transformations led to the synthesis of haliclonin A.
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Affiliation(s)
- Yuan Jin
- Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan
| | - Kensuke Orihara
- Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan
| | - Fumiki Kawagishi
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Tatsuya Toma
- Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan
| | - Tohru Fukuyama
- Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan
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184
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Jin Y, Orihara K, Kawagishi F, Toma T, Fukuyama T, Yokoshima S. Total Synthesis of Haliclonin A. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yuan Jin
- Graduate School of Pharmaceutical Sciences Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8601 Japan
| | - Kensuke Orihara
- Graduate School of Pharmaceutical Sciences Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8601 Japan
| | - Fumiki Kawagishi
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Tatsuya Toma
- Graduate School of Pharmaceutical Sciences Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8601 Japan
| | - Tohru Fukuyama
- Graduate School of Pharmaceutical Sciences Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8601 Japan
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8601 Japan
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185
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Shen L, Zou XP, Li WS, Mándi A, Kurtán T, Wu J. Granatripodins A-B, limonoids featuring a Tricyclo[3.3.1.0 2,8]nonane motif: Absolute configuration and agonistic effects on human pregnane-X-receptor. Bioorg Chem 2021; 111:104888. [PMID: 33862473 DOI: 10.1016/j.bioorg.2021.104888] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 03/31/2021] [Accepted: 03/31/2021] [Indexed: 01/10/2023]
Abstract
Two unprecedented limonoids incorporating a sterically encumbered cyclopropane ring, named granatripodins A (1) and B (2), featuring the presence of a tricyclo[3.3.1.02,8]nonane motif, were obtained from seeds of the Thai Xylocarpus granatum. The planar structures and absolute configurations of these limonoids were unambiguously established by NMR investigations, TDDFT-ECD and DFT-NMR calculations, and single-crystal X-ray diffraction analysis (Cu Kα). Most notably, granatripodin A (1) exhibited agonistic effects on human pregnane-X-receptor at the concentration of 100.0 nM. The biosynthetic origins of these limonoids via a radical cascade reaction are proposed. This study exemplifies a universal approach for the stereochemical assignment of polycyclic compounds with a cyclopropane-embedded cage scaffold.
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Affiliation(s)
- Li Shen
- Marine Drugs Research Center, College of Pharmacy, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, PR China.
| | - Xiao-Peng Zou
- Marine Drugs Research Center, College of Pharmacy, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, PR China
| | - Wan-Shan Li
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, PR China
| | - Attila Mándi
- Department of Organic Chemistry, University of Debrecen, PO Box 400, 4002 Debrecen, Hungary
| | - Tibor Kurtán
- Department of Organic Chemistry, University of Debrecen, PO Box 400, 4002 Debrecen, Hungary
| | - Jun Wu
- School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, PR China; Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, PR China; Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, PR China.
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186
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Hsieh YH, Iwasaki H, Iwai Y, Tanabe Y, Taketomo R, Yamanishi S, Tanaka Y, Kojima N, Yamashita M. Reaction of 3-Oxa-2-oxobicyclo[4.2.0]oct-4-ene-1-carboxylate with Dimethylsulfoxonium Methylide. Chem Pharm Bull (Tokyo) 2021; 69:391-399. [PMID: 33790083 DOI: 10.1248/cpb.c20-00993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We have been interested in the reactivities of small-ring compounds and have reported reactions that proceed through cyclopropane intermediates starting from coumarin derivatives bearing an electron-withdrawing group at the 3-position or 2-oxo-2H-pyran-3-carboxylate derivatives and dimethylsulfoxonium methylide. This time, the reaction between 3-oxa-2-oxobicyclo[4.2.0]oct-4-ene-1-carboxylate and dimethylsulfoxonium methylide has been investigated. 3a,4,5,7a-Tetrahydro-7-hydroxybenzofuran-6-carboxylate and/or 2-hydroxybicyclo[4.1.0]hept-2-ene-3-carboxylate were obtained. The compounds were characterized using various spectral and X-ray crystallographic techniques. A plausible reaction mechanism has been discussed. This reaction was applied to some 3-oxa-2-oxobicyclo[4.2.0]oct-4-ene-1-carboxylate derivatives to clarify the generality.
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187
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Tan P, Wang H, Wang SR. Nucleophilic Migratory Cyclopropenation of Activated Alkynes: A Nonmetal Approach to Unbiased Cyclopropenes. Org Lett 2021; 23:2590-2594. [PMID: 33754741 DOI: 10.1021/acs.orglett.1c00498] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
An unprecedented reductive [2 + 1] annulation of α-keto esters with alkynones mediated by P(NMe2)3 is described. Although this nonmetal cyclopropenation is a nucleophilic process, attributed to the ester migration via a formal [2 + 2] cycloaddition reaction of Kukhtin-Ramirez adducts and alkynones followed by a fragmentation, cyclopropenes with an unbiased alkene scaffold are formed in good to excellent yields, thus providing a promising complementarity to electrophilic metal-catalyzed cyclopropenation.
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Affiliation(s)
- Pengwei Tan
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Lu, Shanghai 200241, China
| | - Haoran Wang
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Lu, Shanghai 200241, China
| | - Sunewang R Wang
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Lu, Shanghai 200241, China.,Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Lu, Shanghai 200062, China
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188
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Amino-modified Merrifield resins as recyclable catalysts for the safe and sustainable preparation of functionalized α-diazo carbonyl compounds. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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189
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Li J, Lear MJ, Hayashi Y. Direct Cyclopropanation of α-Cyano β-Aryl Alkanes by Light-Mediated Single Electron Transfer Between Donor-Acceptor Pairs. Chemistry 2021; 27:5901-5905. [PMID: 33565170 DOI: 10.1002/chem.202100341] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/08/2021] [Indexed: 12/21/2022]
Abstract
Cyclopropanes are traditionally prepared by the formal [2+1] addition of carbene or radical based C1 units to alkenes. In contrast, the one-pot intermolecular cyclopropanation of alkanes by redox active C1 units has remained unrealised. Herein, we achieved this process simply by exposing β-aryl propionitriles and C1 radical precursors (N-oxy esters) to base and blue light. The overall process is redox-neutral and a photocatalyst, whether metal- or organic-based, is not required. Our findings support that single electron transfer (SET) from the α-cyano carbanion of the propionitrile to the N-oxy ester is facilitated by blue-light via their electron donor-acceptor (EDA) complex. The α-cyano carbon radical thus formed can then lose a β-proton to form a π-resonance stabilised radical anion that preferentially couples at the benzylic β-position with a decarboxylated C1 radical unit. This new transition metal-free chemistry tolerates both electron rich and electron deficient (hetero)aryl systems, even sulfide or alkene functionality, to afford a range of cis-aryl/cyano cyclopropanes bearing congested tetrasubstituted quaternary carbons.
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Affiliation(s)
- Jing Li
- Department of Chemistry, Graduate School of Science, Tohoku University, Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan
| | - Martin J Lear
- School of Chemistry, University of Lincoln, Brayford Pool, Lincoln, LN6 7TS, UK
| | - Yujiro Hayashi
- Department of Chemistry, Graduate School of Science, Tohoku University, Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan
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190
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Li H, Zhang J, She X. The Total Synthesis of Diquinane-Containing Natural Products. Chemistry 2021; 27:4839-4858. [PMID: 32955141 DOI: 10.1002/chem.202003741] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/15/2020] [Indexed: 12/18/2022]
Abstract
Diquinane or bicyclo[3.3.0]octane is a conspicuous structural unit existing in the carbo-frameworks of a wide range of natural products such as alkaloids and terpenoids. These diquinane-containing molecules not merely exhibit intriguing architectures, but also showcase a broad spectrum of significant bioactivities, which draw widespread attention from the global synthetic community. During the past decade, with an aim to accomplish the total syntheses of such specified cornucopias of natural products, a variety of elegant strategies for construction of the diquinane ring system have been disclosed. In this Minireview, the achievements on this subject in the timeline from 2010 to June 2020 are demonstrated and it is discussed how the diquinane unit is strategically forged in the context of the specific target structure. In addition, impacts of the selected works to the field of natural product total synthesis is highlighted and the particular outlook of diquinane-containing natural product synthesis is provided.
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Affiliation(s)
- Huilin Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, Gansu, P. R. China
| | - Jing Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, Gansu, P. R. China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, Gansu, P. R. China
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191
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Jiang L, Wang Z, Armstrong M, Suero MG. β-Diazocarbonyl Compounds: Synthesis and their Rh(II)-Catalyzed 1,3 C-H Insertions. Angew Chem Int Ed Engl 2021; 60:6177-6184. [PMID: 33275325 DOI: 10.1002/anie.202015077] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Indexed: 12/28/2022]
Abstract
Herein, we describe the first electrophilic diazomethylation of ketone silyl enol ethers with diazomethyl-substituted hypervalent iodine reagents that gives access to unusual β-diazocarbonyl compounds. The potential of this unexplored class of diazo compounds for the development of new reactions was demonstrated by the discovery of a rare Rh-catalyzed intramolecular 1,3 C-H carbene insertion that led to complex cyclopropanes with excellent stereocontrol.
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Affiliation(s)
- Liyin Jiang
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Zhaofeng Wang
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Melanie Armstrong
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Marcos G Suero
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
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192
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Abdou K. D. Dimé, Six Y, Buriez O. An Electrochemical Study of Bis(cyclopentadienyl)titanium(IV) Dichloride in the Presence of Magnesium Ions, Amides or Alkynes. RUSS J ELECTROCHEM+ 2021. [DOI: 10.1134/s1023193521010031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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193
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Menchikov LG, Shulishov EV, Tomilov YV. Recent advances in the catalytic cyclopropanation of unsaturated compounds with diazomethane. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr4982] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The main achievements and development trends of the past 10–15 years related to the catalytic cyclopropanation of unsaturated compounds with diazomethane are integrated and analyzed. The attention is focused on the most efficient catalysts based on palladium compounds. Data on the effects of substrate structure and nature of catalyst components on the regio- and stereoselectivity of these reactions are systematized. Characteristic features of safe methods for diazomethane generation are considered, including the use of membrane technologies and continuous-flow and in situ preparation methods, which have prospects for industrial application.
The bibliography includes 281 references.
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194
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Chen C, Cheng W, Wang J, Chao T, Cheng M, Liu R. Gold‐Catalyzed [3+2]‐Annulations of α‐Aryl Diazoketones with the Tetrasubstituted Alkenes of Cyclopentadienes: High Stereoselectivity and Enantioselectivity. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202012611] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ching‐Nung Chen
- Frontier Research Center for Matter Science and Technology and Department of Chemistry National Tsing-Hua University Hsinchu Taiwan, ROC
| | - Wei‐Min Cheng
- Frontier Research Center for Matter Science and Technology and Department of Chemistry National Tsing-Hua University Hsinchu Taiwan, ROC
| | - Jian‐Kai Wang
- Frontier Research Center for Matter Science and Technology and Department of Chemistry National Tsing-Hua University Hsinchu Taiwan, ROC
| | - Tzu‐Hsuan Chao
- Department of Chemistry National Cheng Kung University East District Tainan City Taiwan, ROC
| | - Mu‐Jeng Cheng
- Department of Chemistry National Cheng Kung University East District Tainan City Taiwan, ROC
| | - Rai‐Shung Liu
- Frontier Research Center for Matter Science and Technology and Department of Chemistry National Tsing-Hua University Hsinchu Taiwan, ROC
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195
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Shen WB, Tang XT, Zhang TT, Lv DC, Zhao D, Su TF, Meng L. Copper(I)-Catalyzed Enyne Oxidation/Cyclopropanation: Divergent and Enantioselective Synthesis of Cyclopropanes. Org Lett 2021; 23:1285-1290. [PMID: 33529040 DOI: 10.1021/acs.orglett.0c04268] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient copper(I)-catalyzed enyne oxidation/cyclopropanation for the modular synthesis of cyclopropane derivatives is described, which represents the first non-noble metal-catalyzed enynes oxidation/cyclopropanation by the in situ generated α-oxo copper carbenes. This protocol allows the assembly of valuable cyclopropane-γ-lactams in generally good to excellent yields with excellent diastereoselectivity. More significantly, the enantioselective version of enyne oxidation/cyclopropanation has been disclosed with chiral copper catalysts.
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Affiliation(s)
- Wen-Bo Shen
- College of Sciences, Henan Agricultural University, Zhengzhou, Henan 450002, China
| | - Xiang-Ting Tang
- College of Sciences, Henan Agricultural University, Zhengzhou, Henan 450002, China
| | - Ting-Ting Zhang
- College of Sciences, Henan Agricultural University, Zhengzhou, Henan 450002, China
| | - Dong-Can Lv
- College of Sciences, Henan Agricultural University, Zhengzhou, Henan 450002, China
| | - Dan Zhao
- College of Sciences, Henan Agricultural University, Zhengzhou, Henan 450002, China
| | - Tong-Fu Su
- College of Sciences, Henan Agricultural University, Zhengzhou, Henan 450002, China
| | - Lei Meng
- College of Sciences, Henan Agricultural University, Zhengzhou, Henan 450002, China
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196
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Cailler LP, Kroitor AP, Martynov AG, Gorbunova YG, Sorokin AB. Selective carbene transfer to amines and olefins catalyzed by ruthenium phthalocyanine complexes with donor substituents. Dalton Trans 2021; 50:2023-2031. [PMID: 33443525 DOI: 10.1039/d0dt04090h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electron-rich ruthenium phthalocyanine complexes were evaluated in carbene transfer reactions from ethyl diazoacetate (EDA) to aromatic and aliphatic olefins as well as to a wide range of aromatic, heterocyclic and aliphatic amines for the first time. It was revealed that the ruthenium octabutoxyphthalocyanine carbonyl complex [(BuO)8Pc]Ru(CO) is the most efficient catalyst converting electron-rich and electron-poor aromatic olefins to cyclopropane derivatives with high yields (typically 80-100%) and high TON (up to 1000) under low catalyst loading and nearly equimolar substrate/EDA ratio. This catalyst shows a rare efficiency in the carbene insertion into amine N-H bonds. Using a 0.05 mol% catalyst loading, a high amine concentration (1 M) and 1.1 eq. of EDA, a number of structurally divergent amines were selectively converted to mono-substituted glycine derivatives with up to quantitative yields and turnover numbers reaching 2000. High selectivity, large substrate scope, low catalyst loading and practical reaction conditions place [(BuO)8Pc]Ru(CO) among the most efficient catalysts for the carbene insertion into amines.
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Affiliation(s)
- Lucie P Cailler
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, 2 av. A. Einstein, 69626 Villeurbanne, France.
| | - Andrey P Kroitor
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leniskii pr., 31, bldg. 4, 119071 Moscow, Russia.
| | - Alexander G Martynov
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leniskii pr., 31, bldg. 4, 119071 Moscow, Russia.
| | - Yulia G Gorbunova
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leniskii pr., 31, bldg. 4, 119071 Moscow, Russia. and N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leniskii pr., 31, 11991 Moscow, Russia.
| | - Alexander B Sorokin
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, 2 av. A. Einstein, 69626 Villeurbanne, France.
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197
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Hosseini SJ, Emamian S, Hassani H, Hamzehzadeh ND. Stereoselective Cyclopropanation of
Arylmethylidenemalononitriles by 2,6-Dimethylquinoline: A Molecular Electron Density
Theory Study. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1070428020120209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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198
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Jiang L, Wang Z, Armstrong M, Suero MG. β‐Diazocarbonyl Compounds: Synthesis and their Rh(II)‐Catalyzed 1,3 C−H Insertions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015077] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Liyin Jiang
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Zhaofeng Wang
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Melanie Armstrong
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Marcos G. Suero
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
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Ashfeld BL, Tucker ZD. (4+1)-Cycloadditions Exploiting the Biphilicity of Oxyphosphonium Enolates and RhII/PdII-Stabilized Metallocarbenes for the Construction of Five-Membered Frameworks. Synlett 2021. [DOI: 10.1055/s-0040-1706009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Abstract(4+1)-Cyclizations are an underutilized disconnect for the formation of five-membered heterocyclic and carbocyclic frameworks. Herein we analyze methods employing oxyphosphonium enolates and RhII/PdII-metallocarbenes as C1 synthons in the presence of several four-atom components for the synthesis of 2,3-dihydrobenzofurans, 2,3-dihydroindoles, oxazolones, cyclopentenones, and pyrrolones.1 Introduction2 (4+1)-Cyclizations Employing Kukhtin–Ramirez-Like Reactivity3 (4+1)-Cyclizations Employing a Cyclopropanation/Ring-Expansion Sequence4 Pd-Catalyzed (4+1)-Cyclizations through Carbene Migratory Insertion/Reductive Elimination Processes5 Summary
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Wang Y, Bai J, Yang Y, Zhao W, Liang Y, Wang D, Zhao Y, Shi Z. Rhodium-catalysed selective C-C bond activation and borylation of cyclopropanes. Chem Sci 2021; 12:3599-3607. [PMID: 34163633 PMCID: PMC8179453 DOI: 10.1039/d0sc06186g] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 03/03/2021] [Accepted: 01/14/2021] [Indexed: 01/31/2023] Open
Abstract
Transition metal (TM)-catalysed directed hydroboration of aliphatic internal olefins which facilitates the construction of complex alkylboronates is an essential synthetic methodology. Here, an efficient method for the borylation of cyclopropanes involving TM-catalysed directed C-C activation has been developed. Upon exposure to neutral Rh(i)-catalyst systems, N-Piv-substituted cyclopropylamines (CPAs) undergo proximal-selective hydroboration with HBpin to provide valuable γ-amino boronates in one step which are otherwise difficult to synthesize by known methods. The enantioenriched substrates can deliver chiral products without erosion of the enantioselectivities. Versatile synthetic utility of the obtained γ-amino boronates is also demonstrated. Experimental and computational mechanistic studies showed the preferred pathway and the origin of this selectivity. This study will enable the further use of CPAs as valuable building blocks for the tunable generation of C-heteroatom or C-C bonds through selective C-C bond activation.
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Affiliation(s)
- Yandong Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093 China
| | - Jingyi Bai
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093 China
| | - Youqing Yang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093 China
| | - Wenxuan Zhao
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093 China
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093 China
| | - Di Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093 China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093 China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093 China
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