1
|
Li X, Wodrich MD, Waser J. Accessing elusive σ-type cyclopropenium cation equivalents through redox gold catalysis. Nat Chem 2024; 16:901-912. [PMID: 38783040 PMCID: PMC11164686 DOI: 10.1038/s41557-024-01535-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 04/15/2024] [Indexed: 05/25/2024]
Abstract
Cyclopropenes are the smallest unsaturated carbocycles. Removing one substituent from cyclopropenes leads to cyclopropenium cations (C3+ systems, CPCs). Stable aromatic π-type CPCs were discovered by Breslow in 1957 by removing a substituent on the aliphatic position. In contrast, σ-type CPCs-formally accessed by removing one substituent on the alkene-are unstable and relatively unexplored. Here we introduce electrophilic cyclopropenyl-gold(III) species as equivalents of σ-type CPCs, which can then react with terminal alkynes and vinylboronic acids. With catalyst loadings as low as 2 mol%, the synthesis of highly functionalized alkynyl- or alkenyl-cyclopropenes proceeded under mild conditions. A class of hypervalent iodine reagents-the cyclopropenyl benziodoxoles (CpBXs)-enabled the direct oxidation of gold(I) to gold(III) with concomitant transfer of a cyclopropenyl group. This protocol was general, tolerant to numerous functional groups and could be used for the late-stage modification of complex natural products, bioactive molecules and pharmaceuticals.
Collapse
Affiliation(s)
- Xiangdong Li
- Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Matthew D Wodrich
- Laboratory for Computational Molecular Design, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Jérôme Waser
- Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
| |
Collapse
|
2
|
Patel RK, Jha P, Chauhan A, Kant R, Kumar R. Polycyclic Pyrazoles from Alkynyl Cyclohexadienones and Nonstabilized Diazoalkanes via [3 + 2]-Cycloaddition/[1,5]-Sigmatropic Rearrangement/Aza-Michael Reaction Cascade. Org Lett 2024; 26:839-844. [PMID: 38252505 DOI: 10.1021/acs.orglett.3c03967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
An efficient method for the stereoselective synthesis of "all center substituted" polycyclic pyrazoles from alkynyl cyclohexa-2,5-dienones and nonstabilized diazoalkanes via sequential [3 + 2]-cycloaddition/[1,5]-sigmatropic rearrangement and aza-Michael reactions is reported. The developed process is highly regioselective and stereoselective. It employs a wide substrate scope to furnish structurally diverse linear and bridged [4.4.n.0] ring-fused pyrazoles in moderate to good yields. One-pot and gram-scale syntheses and synthetic transformations have also been showcased.
Collapse
Affiliation(s)
- Raj Kumar Patel
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh 226031, India
| | - Priyankar Jha
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh 226031, India
| | - Anil Chauhan
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Ruchir Kant
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh 226031, India
| | - Ravindra Kumar
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| |
Collapse
|
3
|
Kuroiwa H, Suzuki S, Irie K, Tsukano C. Total Synthesis and Structure Revision of (+)-Lancilactone C. J Am Chem Soc 2023. [PMID: 37326375 DOI: 10.1021/jacs.3c04124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Lancilactone C is a tricyclic triterpenoid that inhibits human immunodeficiency virus (HIV) replication in H9 lymphocytes with no cytotoxicity. Its tricyclic skeleton comprises trans-dimethylbicyclo[4.3.0]nonane and 7-isopropylenecyclohepta-1,3,5-triene. The latter unique structure, in which all carbon atoms are sp2 hybridized, is not found in other triterpenoids and needs to be verified synthetically. Herein, we have accomplished the first total synthesis of lancilactone C (proposed structure) by developing a new domino [4 + 3] cycloaddition reaction involving oxidation, Diels-Alder reaction, elimination, and electrocyclization. We have also revised the structure based on the total synthesis of lancilactone C according to its plausible biosynthetic pathway.
Collapse
Affiliation(s)
- Hidetaka Kuroiwa
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Soichiro Suzuki
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Kazuhiro Irie
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Chihiro Tsukano
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| |
Collapse
|
4
|
Chen X, Patel K, Marek I. Stereoselective Construction of Tertiary Homoallyl Alcohols and Ethers by Nucleophilic Substitution at Quaternary Carbon Stereocenters. Angew Chem Int Ed Engl 2023; 62:e202212425. [PMID: 36413111 PMCID: PMC10107121 DOI: 10.1002/anie.202212425] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 11/13/2022] [Accepted: 11/22/2022] [Indexed: 11/24/2022]
Abstract
An efficient method for the stereoselective construction of tertiary C-O bonds via a stereoinvertive nucleophilic substitution at the quaternary carbon stereocenter of cyclopropyl carbinol derivatives using water, alcohols and phenols as nucleophiles has been developed. This substitution reaction proceeds under mild conditions and tolerates several functional groups, providing a new access to the stereoselective formation of highly congested tertiary homoallyl alcohols and ethers.
Collapse
Affiliation(s)
- Xu Chen
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology Technion City, Haifa, 3200009, Israel
| | - Kaushalendra Patel
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology Technion City, Haifa, 3200009, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology Technion City, Haifa, 3200009, Israel
| |
Collapse
|
5
|
Chen X, Patel K, Marek I. Stereospecific nucleophilic substitution at quaternary carbon stereocenters of cyclopropyl carbinols. Chem 2023. [DOI: 10.1016/j.chempr.2023.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
|
6
|
Abstract
The various facets of the chemistry of cyclopropane derivatives, the smallest carbocycle, are amazingly diverse and continue to fascinate theoreticians, synthetic or structural chemists having interest in fundamental physical, medicinal chemistry, and natural product synthesis. The challenges generated by this intriguing cyclic arrangement of only three tetravalent carbons represent a wide area of the chemical spectrum. From fundamental aspects of bonding through the synthesis of highly strained molecules, the understanding of the mode of action in biological systems to the selective cleavage into acyclic substrates makes the chemistry of these small rings fascinating. Therefore, efficient routes to prepare differently polysubstituted cyclopropanes have always been of a primordial importance. In the past decade, we and others have expanded the scope of the carbometalation reaction of cyclopropenes as a broad and general method to the formation of stereodefined cyclopropane derivatives. Although cyclopropenes, with their even higher strain energy, easily undergo addition reactions of organometallic reagents, their carbometalation reactions generate new regio-, diastereo-, and enantioselectivity issues that needed to be addressed. These various stereochemical aspects accompanied our research from its origins to today, and we are proposing in this Account, a didactic overview of the different ways by which cyclopropenes can lead to the formation of polysubstituted cyclopropanes or open-products possessing several stereogenic centers as a single regio- and diastereomer.We initially launched our research campaign on the chemistry of these strained three-membered rings by the regio- and diastereoselective copper-catalyzed carbomagnesiation of enantiomerically enriched cyclopropenyl carbinols. The directing alcohol governed both the regio- and diastereoselectivity of the addition and also served as a good leaving group as it undergoes a selective 1,2-elimination reaction to provide enantioenriched alkylidenecyclopropanes in excellent yields and enantiomeric excesses. Then, we turned our attention to the regio- and stereoselective synthesis of stereodefined tri- and tetrasubstituted cyclopropanes through the diastereoselective addition to sp2- monosubstituted cyclopropenyl ester derivatives. With the aim to further expand this concept to the formation of penta- and hexa-substituted cyclopropanes as single isomer, we had first to design the preparation of the required 1,2-disubstituted cyclopropenes that would control the regioselective addition of the organometallic derivatives. The synthesis of penta- and hexa-substituted cyclopropanes was then reported for the first time as a single regio- and diastereomer. It should be noted that the in situ formed cyclopropyl-metal intermediate is configurationally stable and can be subsequently functionalized with pure retention of the configuration by addition of electrophiles. Then, the enantioselective-catalyzed carbometalation reaction of achiral cyclopropenes allowed the synthesis of several new classes of cyclopropane derivatives in high enantiomeric ratios. Finally, by combining the regio- and diastereoselective carbometalation reaction of a cyclopropene with a subsequent reaction of the resulting cyclopropylmetal species, a selective carbon-carbon bond cleavage was observed to lead to the preparation of acyclic substrates possessing several stereocenters including a quaternary carbon stereogenic center. Our original vision of using strain within an embedded double bond in a three-membered ring has provided new routes to the stereoselective synthesis of polysubstituted cyclopropanes and has been extremely successful, as it represents a current new tool for the synthesis of persubstituted cyclopropanes as a single diastereomer.
Collapse
|
7
|
Abstract
![]()
A new approach to
polysubstituted spiropentanes is developed
through
a regio- and diastereoselective carbometalation of sp2-disubstituted
cyclopropenes. The control of selectivity originates from a combined syn-facial diastereoselective carbometalation with a regio-directed
addition. The regio-controlling element subsequently serves as a leaving
group in an intramolecular nucleophilic substitution. This method
allows the preparation of various polysubstituted spiropentanes with
up to five contiguous stereocenters.
Collapse
Affiliation(s)
- Yair Cohen
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, Haifa, 32000, Israel
| | - Dor Toledano
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, Haifa, 32000, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, Haifa, 32000, Israel
| |
Collapse
|
8
|
Augustin AU, Di Silvio S, Marek I. Borylated Cyclopropanes as Spring-Loaded Entities: Access to Vicinal Tertiary and Quaternary Carbon Stereocenters in Acyclic Systems. J Am Chem Soc 2022; 144:16298-16302. [PMID: 36041738 PMCID: PMC9479080 DOI: 10.1021/jacs.2c07394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Herein, we present the formation of acyclic frameworks
bearing
two consecutive stereocenters of either tertiary or quaternary nature
starting from easily accessible cyclopropenes. This holistic approach
involves a regio- and diastereoselective hydro- or carboborylation
of substituted cyclopropenyl esters. Formation of boronate complexes
of the latter via the addition of nucleophiles and subsequent stereospecific
1,2-migration with carbon–carbon bond cleavage delivered the
title compounds.
Collapse
Affiliation(s)
- André U Augustin
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 3200009, Israel
| | - Sergio Di Silvio
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 3200009, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 3200009, Israel
| |
Collapse
|
9
|
Chang CC, Jan HM, Tseng CJ, Mondal S, Abera AB, Hsieh MY, Yang TC, Muthusamy S, Huang SC, Lin CH, Tony Mong KK. Metabolic Isolation, Stereochemical Determination, and Total Synthesis of Predominant Native Cholesteryl Phosphatidyl-α-glucoside from Carcinogenic Helicobacter pylori. Org Lett 2022; 24:5045-5050. [PMID: 35816729 DOI: 10.1021/acs.orglett.2c01815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the isolation and stereochemical determination of the predominant native cholesteryl 6-O-phosphatidyl α-glucoside (CPG) from Helicobacter pylori via an integrated biological and chemical strategy. The strategy employed (i) the metabolic isolation of a CPG analogue and (ii) the enzymatic degradation of the analogue to obtain the native lactobacillic acid for the stereochemical determination. The absolute stereochemistry of the acid was found to be 11R and 12S. Using the new stereochemical data, we accomplished the total synthesis of predominant native CPG and other predominant αCG derivatives.
Collapse
Affiliation(s)
- Chia-Chen Chang
- Applied Chemistry Department, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu City 300093Taiwan, R.O.C
| | - Hau-Ming Jan
- Institute of Biological Chemistry, Academia Sinica, No.128 Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan
| | - Chieh-Jen Tseng
- Applied Chemistry Department, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu City 300093Taiwan, R.O.C
| | - Soumik Mondal
- Applied Chemistry Department, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu City 300093Taiwan, R.O.C
| | - Andualem Bahiru Abera
- Institute of Biological Chemistry, Academia Sinica, No.128 Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan.,Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan.,Graduate Institute of Biotechnology and Biotechnology Center, National Chung-Hsing University, Taichung 40227, Taiwan
| | - Ming-Yen Hsieh
- Institute of Biological Chemistry, Academia Sinica, No.128 Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan
| | - Tsai-Chen Yang
- Institute of Biological Chemistry, Academia Sinica, No.128 Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan
| | - Sasikala Muthusamy
- Institute of Biological Chemistry, Academia Sinica, No.128 Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan.,Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan.,Graduate Institute of Biotechnology and Biotechnology Center, National Chung-Hsing University, Taichung 40227, Taiwan
| | - Sheng-Cih Huang
- Applied Chemistry Department, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu City 300093Taiwan, R.O.C
| | - Chun-Hung Lin
- Institute of Biological Chemistry, Academia Sinica, No.128 Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan.,Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan.,Graduate Institute of Biotechnology and Biotechnology Center, National Chung-Hsing University, Taichung 40227, Taiwan.,Department of Chemistry and Institute of Biochemical Sciences, National Taiwan University, Taipei 10617, Taiwan
| | - Kwok-Kong Tony Mong
- Applied Chemistry Department, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu City 300093Taiwan, R.O.C
| |
Collapse
|
10
|
Siddaraju Y, Sabbatani J, Cohen A, Marek I. Preparation of Distant Quaternary Carbon Stereocenters by Double Selective Ring-Opening of 1,1-Biscyclopropyl Methanol Derivatives. Angew Chem Int Ed Engl 2022; 61:e202203652. [PMID: 35521738 PMCID: PMC9401570 DOI: 10.1002/anie.202203652] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Indexed: 12/15/2022]
Abstract
The diastereoselective double carbometalation reaction of cyclopropenes provides, in a single‐pot operation, two ω‐ene‐[1,1]‐bicyclopropyl ester derivatives. One regioisomer then undergoes a Pd‐catalyzed addition of aryl iodide to provide skipped dienes possessing several distant stereocenters including two congested quaternary carbon centers with excellent diastereoselectivity.
Collapse
Affiliation(s)
- Yogesh Siddaraju
- Schulich Faculty of Chemistry, Technion-, Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
| | - Juliette Sabbatani
- Schulich Faculty of Chemistry, Technion-, Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
| | - Anthony Cohen
- Schulich Faculty of Chemistry, Technion-, Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion-, Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
| |
Collapse
|
11
|
Siddaraju Y, Sabbatani J, Cohen A, Marek I. Preparation of Distant Quaternary Carbon Stereocenters by Double Selective Ring‐Opening of 1,1‐Biscyclopropyl Methanol Derivatives. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203652] [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)
| | | | - Anthony Cohen
- Technion Israel Institute of Technology Chemistry ISRAEL
| | - Ilan Marek
- Technion - Israel Institute of Technology Schulich Faculty of Chemistry Technion City 32000 Haifa ISRAEL
| |
Collapse
|
12
|
Patel K, Lanke V, Marek I. Stereospecific Construction of Quaternary Carbon Stereocenters from Quaternary Carbon Stereocenters. J Am Chem Soc 2022; 144:7066-7071. [PMID: 35412821 PMCID: PMC9052742 DOI: 10.1021/jacs.2c01695] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Organoaluminum species
promote a smooth nucleophilic substitution
at the quaternary carbon stereocenter of stereodefined polysubstituted
cyclopropyl methyl phosphate with a complete inversion of configuration,
even when more reactive functional groups are present. The regio-
and diastereoselectivity of the substitution is attributed to the
existence of a bicyclobutonium intermediate.
Collapse
Affiliation(s)
- Kaushalendra Patel
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Veeranjaneyulu Lanke
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| |
Collapse
|
13
|
Traboulsi I, Dange NS, Pirenne V, Robert F, Landais Y. Enantioselective Total Synthesis of (+)‐Eucophylline. Chemistry 2022; 28:e202200088. [DOI: 10.1002/chem.202200088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Iman Traboulsi
- Institute of Molecular Sciences (ISM) Univ. Bordeaux, CNRS, UMR-5255 351 Cours de la Libération 33400 Talence France
| | - Nitin S. Dange
- Institute of Molecular Sciences (ISM) Univ. Bordeaux, CNRS, UMR-5255 351 Cours de la Libération 33400 Talence France
| | - Vincent Pirenne
- Institute of Molecular Sciences (ISM) Univ. Bordeaux, CNRS, UMR-5255 351 Cours de la Libération 33400 Talence France
| | - Frédéric Robert
- Institute of Molecular Sciences (ISM) Univ. Bordeaux, CNRS, UMR-5255 351 Cours de la Libération 33400 Talence France
| | - Yannick Landais
- Institute of Molecular Sciences (ISM) Univ. Bordeaux, CNRS, UMR-5255 351 Cours de la Libération 33400 Talence France
| |
Collapse
|
14
|
Abshire A, Moore D, Courtney J, Darko A. Heteroleptic dirhodium(II,II) paddlewheel complexes as carbene transfer catalysts. Org Biomol Chem 2021; 19:8886-8905. [PMID: 34611688 DOI: 10.1039/d1ob01414e] [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
This review highlights the applications of dirhodium(II,II) paddlewheel complexes with a heteroleptic scaffold. Dirhodium(II,II) paddlewheel complexes are well known as highly efficient and selective carbene transfer catalysts. While the majority of described complexes are homoleptic, comparatively fewer studies have concerned heteroleptic complexes. Here, we emphasise the use of heteroleptic complexes in order to highlight their benefits as carbene transfer catalysts and spur future research. Methods to synthesise heteroleptic dirhodium(II,II) paddlewheel complexes are discussed as well as a categorical review of their types of heteroleptic complexes and the carbene reactions in which they have been used.
Collapse
Affiliation(s)
- Anthony Abshire
- Department of Chemistry, University of Tennessee, Knoxville, TN 37796-1600, USA.
| | - Desiree Moore
- Department of Chemistry, University of Tennessee, Knoxville, TN 37796-1600, USA.
| | - Jobe Courtney
- Department of Chemistry, University of Tennessee, Knoxville, TN 37796-1600, USA.
| | - Ampofo Darko
- Department of Chemistry, University of Tennessee, Knoxville, TN 37796-1600, USA.
| |
Collapse
|
15
|
Music A, Nuber CM, Lemke Y, Spieß P, Didier D. Electro-alkynylation: Intramolecular Rearrangement of Trialkynylorganoborates for Chemoselective C(sp 2)-C(sp) Bond Formation. Org Lett 2021; 23:4179-4184. [PMID: 34004116 DOI: 10.1021/acs.orglett.1c01126] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An alternative and complementary transformation for the synthesis of aryl- and heteroaryl-substituted alkynes is presented that relies on a chemoselective electrocoupling process. Tetraorganoborate substrates were logically designed and simply accessed by transmetalations using readily or commercially available organotrifluoroborate salts.
Collapse
Affiliation(s)
- Arif Music
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Constantin M Nuber
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Yannick Lemke
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Philipp Spieß
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Dorian Didier
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 Munich, Germany
| |
Collapse
|
16
|
Affiliation(s)
- Radim Hrdina
- Institute of Organic Chemistry Justus-Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
| |
Collapse
|
17
|
Abstract
Treatment of bis(pyrazolyl)borate ligand supported [(CF3)2Bp]Cu(NCMe) with 1,2,3-trisubstituted cyclopropenes produced thermally stable copper(I) η2-cyclopropene complexes amenable to detailed solution and solid-state analysis. The [(CF3)2Bp]Cu(NCMe) also catalyzed [2 + 1]-cycloaddition chemistry of terminal and internal alkynes with ethyl diazoacetate affording cyclopropenes, including those used as ligands in this work. The tris(pyrazolyl)borate [(CF3)2Tp]Cu(NCMe) is a competent catalyst for this process as well. The treatment of [(CF3)2Tp]Cu with ethyl 2,3-diethylcycloprop-2-enecarboxylate substrate gave an O-bonded rather than a η2-cyclopropene copper complex.
Collapse
Affiliation(s)
- Anurag Noonikara-Poyil
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, United States
| | - Shawn G Ridlen
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, United States
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, United States
| |
Collapse
|
18
|
Pierrot D, Marek I. Stereospecific Reactions Leading to Allylboronic Esters Within Acyclic Systems Bearing Distant Stereocenters. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- David Pierrot
- Schulich Faculty of Chemistry, Technion— Israel Institute of Technology Technion City 3200009 Haifa Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion— Israel Institute of Technology Technion City 3200009 Haifa Israel
| |
Collapse
|
19
|
Pierrot D, Marek I. Stereospecific Reactions Leading to Allylboronic Esters Within Acyclic Systems Bearing Distant Stereocenters. Angew Chem Int Ed Engl 2020; 59:20434-20438. [PMID: 32757448 DOI: 10.1002/anie.202010135] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/05/2020] [Indexed: 11/11/2022]
Abstract
The preparation of acyclic molecules featuring congested stereocenters in a 1,4-relationship in only three catalytic steps from commercially available building blocks is reported. This approach involves a diastereoselective diboration of alkenyl cyclopropyl methanol derivatives followed by a regioselective exergonic ring fragmentation. The starting materials can be prepared enantiomerically enriched and all substituents can be interconverted, therefore, this strategy allows a large variety of diversely functionalized allylboronic esters possessing distant tetrasubstituted stereocenters with high diastereoselectivity.
Collapse
Affiliation(s)
- David Pierrot
- Schulich Faculty of Chemistry, Technion-, Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion-, Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
| |
Collapse
|
20
|
Abstract
Three- and four-membered rings, widespread motifs in nature and medicinal chemistry, have fascinated chemists ever since their discovery. However, due to energetic considerations, small rings are often difficult to assemble. In this regard, homogeneous gold catalysis has emerged as a powerful tool to construct these highly strained carbocycles. This review aims to provide a comprehensive summary of all the major advances and discoveries made in the gold-catalyzed synthesis of cyclopropanes, cyclopropenes, cyclobutanes, cyclobutenes, and their corresponding heterocyclic or heterosubstituted analogs.
Collapse
Affiliation(s)
- Mauro Mato
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain.,Departament de Quı́mica Analı́tica i Quı́mica Orgànica, Universitat Rovira i Virgili, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain
| | - Allegra Franchino
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain.,Departament de Quı́mica Analı́tica i Quı́mica Orgànica, Universitat Rovira i Virgili, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain
| | - Cristina Garcı A-Morales
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain.,Departament de Quı́mica Analı́tica i Quı́mica Orgànica, Universitat Rovira i Virgili, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain
| | - Antonio M Echavarren
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain.,Departament de Quı́mica Analı́tica i Quı́mica Orgànica, Universitat Rovira i Virgili, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain
| |
Collapse
|
21
|
Cohen Y, Cohen A, Marek I. Creating Stereocenters within Acyclic Systems by C–C Bond Cleavage of Cyclopropanes. Chem Rev 2020; 121:140-161. [DOI: 10.1021/acs.chemrev.0c00167] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yair Cohen
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City, Haifa 3200009, Israel
| | - Anthony Cohen
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City, Haifa 3200009, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City, Haifa 3200009, Israel
| |
Collapse
|
22
|
Caló FP, Fürstner A. A Heteroleptic Dirhodium Catalyst for Asymmetric Cyclopropanation with α‐Stannyl α‐Diazoacetate. “Stereoretentive” Stille Coupling with Formation of Chiral Quarternary Carbon Centers. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004377] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Fabio P. Caló
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| |
Collapse
|
23
|
Caló FP, Fürstner A. A Heteroleptic Dirhodium Catalyst for Asymmetric Cyclopropanation with α-Stannyl α-Diazoacetate. "Stereoretentive" Stille Coupling with Formation of Chiral Quarternary Carbon Centers. Angew Chem Int Ed Engl 2020; 59:13900-13907. [PMID: 32426901 PMCID: PMC7496581 DOI: 10.1002/anie.202004377] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/18/2020] [Indexed: 01/06/2023]
Abstract
The heteroleptic dirhodium paddlewheel catalyst 7 with a chiral carboxylate/acetamidate ligand sphere is uniquely effective in asymmetric [2+1] cycloadditions with α‐diazo‐α‐trimethylstannyl (silyl, germyl) acetate. Originally discovered as a trace impurity in a sample of the homoleptic parent complex [Rh2((R)‐TPCP)4] (5), it is shown that the protic acetamidate ligand is quintessential for rendering 7 highly enantioselective. The ‐NH group is thought to lock the ensuing metal carbene in place via interligand hydrogen bonding. The resulting stannylated cyclopropanes undergo “stereoretentive” cross coupling, which shows for the first time that even chiral quarternary carbon centers can be made by the Stille–Migita reaction.
Collapse
Affiliation(s)
- Fabio P Caló
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
| |
Collapse
|
24
|
Wang YJ, Li XX, Chen Z. Gold-Catalyzed Diastereoselective Formal Intermolecular [4 + 2 + 1] Cycloaddition of 1,3-Dien-8-yne with Diazo Ester. J Org Chem 2020; 85:7694-7703. [DOI: 10.1021/acs.joc.0c00146] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yu-Jiang Wang
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Xiao-Xiao Li
- College of Chemistry & Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China
| | - Zili Chen
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| |
Collapse
|
25
|
Zhang C, Jiao H, Jia W. Theoretical predication of Diels-Alder reactions of highly strained dienophiles. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.112734] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
26
|
Lanke V, Marek I. Nucleophilic Substitution at Quaternary Carbon Stereocenters. J Am Chem Soc 2020; 142:5543-5548. [DOI: 10.1021/jacs.0c01133] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Veeranjaneyulu Lanke
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City 3200009, Haifa, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City 3200009, Haifa, Israel
| |
Collapse
|
27
|
Zhang J, Yang Q, Zhu Y, Wang J, Deng G. Synthesis and Rhodium(II)-Mediated Cascade Cyclopropanation/Rearrangement/Isomerization of Diazo 2,3,5-Trisubstituted Furans: The Construction of Penta-substituted Aromatic Compounds. J Org Chem 2020; 85:2395-2405. [PMID: 31916442 DOI: 10.1021/acs.joc.9b03093] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Ag(I)-catalyzed synthesis of diazo-trisubstituted furans starting from diazo-cumulated allenyl ketones has been investigated. The Rh2(OAc)4-catalyzed reaction of the diazo 2,3,5-trisubstituted furans provided penta-substituted aromatics via cascade intermolecular cyclopropanation/rearrangement/isomerization. The cyclopropanation on the furan ring/rearrangement of cyclopropane moiety has been reported. A reasonable mechanism is proposed.
Collapse
Affiliation(s)
- Jianfang Zhang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) , Hunan Normal University , Changsha 410081 , China.,Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province , Hunan Normal University , Changsha 410081 , China
| | - Qin Yang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) , Hunan Normal University , Changsha 410081 , China.,Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province , Hunan Normal University , Changsha 410081 , China
| | - Yang Zhu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) , Hunan Normal University , Changsha 410081 , China.,Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province , Hunan Normal University , Changsha 410081 , China
| | - Jianbo Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS) , Peking University , Beijing 100871 , PR China
| | - Guisheng Deng
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) , Hunan Normal University , Changsha 410081 , China.,Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province , Hunan Normal University , Changsha 410081 , China.,Beijing National Laboratory for Molecular Sciences (BNLMS) , Peking University , Beijing 100871 , PR China
| |
Collapse
|
28
|
Okada S, Taylor M, Zhou XR, Naim F, Marshall D, Blanksby SJ, Singh SP, Wood CC. Producing Cyclopropane Fatty Acid in Plant Leafy Biomass via Expression of Bacterial and Plant Cyclopropane Fatty Acid Synthases. FRONTIERS IN PLANT SCIENCE 2020; 11:30. [PMID: 32117373 PMCID: PMC7020751 DOI: 10.3389/fpls.2020.00030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 01/13/2020] [Indexed: 05/14/2023]
Abstract
Saturated mid-chain branched fatty acids (SMCBFAs) are widely used in the petrochemical industry for their high oxidative stability and low melting temperature. Dihydrosterculic acid (DHSA) is a cyclopropane fatty acid (CPA) that can be converted to SMCBFA via hydrogenation, and therefore oils rich in DHSA are a potential feedstock for SMCBFA. Recent attempts to produce DHSA in seed oil by recombinant expression of cyclopropane fatty acid synthases (CPFASes) resulted in decreased oil content and poor germination or low DHSA accumulation. Here we explored the potential for plant vegetative tissue to produce DHSA by transiently expressing CPFAS enzymes in leaf. When CPFASes from plant and bacterial origin were transiently expressed in Nicotiana benthamiana leaf, it accumulated up to 1 and 3.7% DHSA in total fatty acid methyl ester (FAME), respectively, which increased up to 4.8 and 11.8%, respectively, when the N. benthamiana endogenous oleoyl desaturase was silenced using RNA interference (RNAi). Bacterial CPFAS expression produced a novel fatty acid with a cyclopropane ring and two carbon-carbon double bonds, which was not seen with plant CPFAS expression. We also observed a small but significant additive effect on DHSA accumulation when both plant and bacterial CPFASes were co-expressed, possibly due to activity upon different oleoyl substrates within the plant cell. Lipidomics analyses found that CPFAS expression increased triacylglycerol (TAG) accumulation relative to controls and that DHSA was distributed across a range of lipid species, including diacylglycerol and galactolipids. DHSA and the novel CPA were present in phosphatidylethanolamine when bacterial CPFAS was expressed in leaf. Finally, when plant diacylglycerol acyltransferase was coexpressed with the CPFASes DHSA accumulated up to 15% in TAG. This study shows that leaves can readily produce and accumulate DHSA in leaf oil. Our findings are discussed in line with current knowledge in leaf oil production for a possible route to DHSA production in vegetative tissue.
Collapse
Affiliation(s)
- Shoko Okada
- CSIRO Land and Water, Canberra, ACT, Australia
| | | | - Xue-Rong Zhou
- CSIRO Agriculture and Food, Canberra, ACT, Australia
| | - Fatima Naim
- Center for Crop Disease Management, Faculty of Science and Engineering, School of Molecular and Life Sciences, Curtin University, Perth, WA, Australia
| | - David Marshall
- Central Analytical Research Facility, Institute for Future Environments, Queensland University of Technology, Brisbane, QLD, Australia
| | - Stephen J. Blanksby
- Central Analytical Research Facility, Institute for Future Environments, Queensland University of Technology, Brisbane, QLD, Australia
| | | | - Craig C. Wood
- CSIRO Agriculture and Food, Canberra, ACT, Australia
| |
Collapse
|
29
|
Tran UPN, Hommelsheim R, Yang Z, Empel C, Hock KJ, Nguyen TV, Koenigs RM. Catalytic Synthesis of Trifluoromethyl Cyclopropenes and Oligo-Cyclopropenes. Chemistry 2020; 26:1254-1257. [PMID: 31617620 PMCID: PMC7028152 DOI: 10.1002/chem.201904680] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Indexed: 12/17/2022]
Abstract
The synthesis of trifluoromethylated cyclopropenes is often associated with important applications in drug discovery and functional materials. In this report, we describe the use of readily available chiral rhodium(II) catalysts for a highly efficient asymmetric cyclopropenation reaction of fluorinated donor–acceptor diazoalkanes with a broad variety of aliphatic and aromatic alkynes. Further studies highlight the unique reactivity of fluorinated donor–acceptor diazoalkanes in the synthesis of oligo‐cyclopropenes. Subsequent C−H functionalization of trifluoromethyl cyclopropenes furnishes densely substituted cyclopropene frameworks and also allows the alternative synthesis of bis‐cyclopropenes.
Collapse
Affiliation(s)
- Uyen P N Tran
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany.,School of Chemistry, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Renè Hommelsheim
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Zhen Yang
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Claire Empel
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Katharina J Hock
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Thanh V Nguyen
- School of Chemistry, University of New South Wales, Sydney, NSW, 2052, Australia
| | - René M Koenigs
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| |
Collapse
|
30
|
Pirenne V, Traboulsi I, Rouvière L, Lusseau J, Massip S, Bassani DM, Robert F, Landais Y. p-Anisaldehyde-Photosensitized Sulfonylcyanation of Chiral Cyclobutenes: Enantioselective Access to Cyclic and Acyclic Systems Bearing All-Carbon Quaternary Stereocenters. Org Lett 2019; 22:575-579. [DOI: 10.1021/acs.orglett.9b04345] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Vincent Pirenne
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| | - Iman Traboulsi
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| | - Lisa Rouvière
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| | - Jonathan Lusseau
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| | - Stéphane Massip
- European Institute of Chemistry and Biology (IECB), University of Bordeaux, 2 Rue Robert Escarpit, 33600 Pessac, France
| | - Dario M. Bassani
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| | - Frédéric Robert
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| | - Yannick Landais
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| |
Collapse
|
31
|
Zhao Q, Hao WJ, Shi HN, Xu T, Tu SJ, Jiang B. Photocatalytic Annulation–Alkynyl Migration Strategy for Multiple Functionalization of Dual Unactivated Alkenes. Org Lett 2019; 21:9784-9789. [DOI: 10.1021/acs.orglett.9b04018] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Qi Zhao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Hao-Nan Shi
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Ting Xu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| |
Collapse
|
32
|
Zhang X, Cao WB, Li HY, Xu XP, Ji SJ. Synthesis of Polysubstituted Maleimides via Metal-Free Cascade Reaction of Isocyanides and α-Diazoketones. J Org Chem 2019; 84:16237-16244. [DOI: 10.1021/acs.joc.9b02830] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
33
|
Cohen Y, Marek I. Regio- and Diastereoselective Copper-Catalyzed Carbometalation of Cyclopropenylsilanes. Org Lett 2019; 21:9162-9165. [PMID: 31674787 DOI: 10.1021/acs.orglett.9b03531] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We therein report a regio- and diastereoselective copper-catalyzed carbometalation of enantioenriched readily available cyclopropenylsilanes as a synthetic tool to access a large family of stereodefined fully-(hexa)-substituted cyclopropanes.
Collapse
Affiliation(s)
- Yair Cohen
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Technion City, Haifa , 3200009 , Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Technion City, Haifa , 3200009 , Israel
| |
Collapse
|
34
|
Zhang ZQ, Zheng MM, Xue XS, Marek I, Zhang FG, Ma JA. Catalytic Enantioselective Cyclopropenation of Internal Alkynes: Access to Difluoromethylated Three-Membered Carbocycles. Angew Chem Int Ed Engl 2019; 58:18191-18196. [PMID: 31633856 DOI: 10.1002/anie.201911701] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/14/2019] [Indexed: 01/27/2023]
Abstract
Herein we described an efficient RhII -catalyzed enantioselective cyclopropenation reaction of internal alkynes with a masked difluorodiazoethane reagent (PhSO2 CF2 CHN2 , Ps-DFA). This asymmetric transformation offers efficient access to a broad range of enantioenriched difluoromethylated cyclopropenes (40 examples, up to 99 % yield, 97 % ee). The synthetic utility of obtained strained carbocycles is demonstrated by subsequent stereodefined processes, including cross-couplings, hydrogenation, Diels-Alder reaction, and Pauson-Khand reaction.
Collapse
Affiliation(s)
- Zhi-Qi Zhang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin Collaborative Innovation Centre of Chemical Science & Engineering, Tianjin University, Tianjin, 300072, P. R. China.,Joint School of NUS & TJU, International Campus of Tianjin University, Fuzhou, 350207, P. R. China
| | - Meng-Meng Zheng
- State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Xiao-Song Xue
- State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200009, Israel
| | - Fa-Guang Zhang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin Collaborative Innovation Centre of Chemical Science & Engineering, Tianjin University, Tianjin, 300072, P. R. China.,Joint School of NUS & TJU, International Campus of Tianjin University, Fuzhou, 350207, P. R. China
| | - Jun-An Ma
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin Collaborative Innovation Centre of Chemical Science & Engineering, Tianjin University, Tianjin, 300072, P. R. China.,Joint School of NUS & TJU, International Campus of Tianjin University, Fuzhou, 350207, P. R. China.,State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin, 300071, P. R. China
| |
Collapse
|
35
|
Zhang Z, Zheng M, Xue X, Marek I, Zhang F, Ma J. Catalytic Enantioselective Cyclopropenation of Internal Alkynes: Access to Difluoromethylated Three‐Membered Carbocycles. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201911701] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Zhi‐Qi Zhang
- Department of ChemistryTianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin Collaborative Innovation Centre of Chemical Science & EngineeringTianjin University Tianjin 300072 P. R. China
- Joint School of NUS & TJUInternational Campus of Tianjin University Fuzhou 350207 P. R. China
| | - Meng‐Meng Zheng
- State Key Laboratory of Elemento-organic ChemistryNankai University Tianjin 300071 P. R. China
| | - Xiao‐Song Xue
- State Key Laboratory of Elemento-organic ChemistryNankai University Tianjin 300071 P. R. China
| | - Ilan Marek
- Schulich Faculty of ChemistryTechnion-Israel Institute of Technology Haifa 3200009 Israel
| | - Fa‐Guang Zhang
- Department of ChemistryTianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin Collaborative Innovation Centre of Chemical Science & EngineeringTianjin University Tianjin 300072 P. R. China
- Joint School of NUS & TJUInternational Campus of Tianjin University Fuzhou 350207 P. R. China
| | - Jun‐An Ma
- Department of ChemistryTianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin Collaborative Innovation Centre of Chemical Science & EngineeringTianjin University Tianjin 300072 P. R. China
- Joint School of NUS & TJUInternational Campus of Tianjin University Fuzhou 350207 P. R. China
- State Key Laboratory of Elemento-organic ChemistryNankai University Tianjin 300071 P. R. China
| |
Collapse
|
36
|
Lanke V, Zhang FG, Kaushansky A, Marek I. Diastereoselective ring opening of fully-substituted cyclopropanes via intramolecular Friedel-Crafts alkylation. Chem Sci 2019; 10:9548-9554. [PMID: 32055326 PMCID: PMC6979362 DOI: 10.1039/c9sc03832a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 08/26/2019] [Indexed: 12/15/2022] Open
Abstract
We herein disclose a diastereoselective ring opening of non-donor-acceptor cyclopropanes via an intramolecular Friedel-Crafts alkylation en route to functionalized dihydronaphthalene scaffolds possessing quaternary carbon stereocentres. The transformation proceeds through a selective bond breaking at the most alkylated carbon centre with a pure retention of configuration. Mechanistic investigations and computational studies revealed that alkoxy functionality is the key for selective bond breaking leading to a complete retention of configuration.
Collapse
Affiliation(s)
- Veeranjaneyulu Lanke
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Technion City 3200009 , Haifa , Israel .
| | - Fa-Guang Zhang
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Technion City 3200009 , Haifa , Israel .
| | - Alexander Kaushansky
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Technion City 3200009 , Haifa , Israel .
| | - Ilan Marek
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Technion City 3200009 , Haifa , Israel .
| |
Collapse
|
37
|
Herraiz AG, Suero MG. A transition-metal-free & diazo-free styrene cyclopropanation. Chem Sci 2019; 10:9374-9379. [PMID: 32110302 PMCID: PMC7017872 DOI: 10.1039/c9sc02749a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 08/17/2019] [Indexed: 12/13/2022] Open
Abstract
An operationally simple and broadly applicable novel cyclopropanation of styrenes using gem-diiodomethyl carbonyl reagents has been developed. Visible-light triggered the photoinduced generation of iodomethyl carbonyl radicals, able to cyclopropanate a wide array of styrenes with excellent chemoselectivity and functional group tolerance. To highlight the utility of our photocyclopropanation, we demonstrated the late-stage functionalization of biomolecule derivatives.
Collapse
Affiliation(s)
- Ana G Herraiz
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , Tarragona , 43007 , Spain .
- Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , Calle Marcel. lí Domingo, 1 , Tarragona , 43007 , Spain
| | - Marcos G Suero
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , Tarragona , 43007 , Spain .
| |
Collapse
|
38
|
Chu Z, Tang Z, Zhang K, Wang L, Li W, Wu HH, Zhang J. Gold(I)-Catalyzed Enantioselective Cyclopropanation of α-Aryl Diazoacetates with Enamides. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00415] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhaowei Chu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P. R. China
| | - Zhiqiong Tang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P. R. China
| | - Kenan Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P. R. China
| | - Lei Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P. R. China
| | - Wenbo Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P. R. China
| | - Hai-Hong Wu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P. R. China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P. R. China
| |
Collapse
|
39
|
Inuki S, Fujimoto Y. Total synthesis of naturally occurring chiral cyclopropane fatty acids and related compounds. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.03.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
40
|
Hommelsheim R, Guo Y, Yang Z, Empel C, Koenigs RM. Blue‐Light‐Induced Carbene‐Transfer Reactions of Diazoalkanes. Angew Chem Int Ed Engl 2019; 58:1203-1207. [DOI: 10.1002/anie.201811991] [Citation(s) in RCA: 133] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 11/13/2018] [Indexed: 01/02/2023]
Affiliation(s)
- Renè Hommelsheim
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Yujing Guo
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Zhen Yang
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Claire Empel
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Rene M. Koenigs
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| |
Collapse
|
41
|
López-Rodríguez A, Domínguez G, Pérez-Castells J. Ruthenium Catalyzed Rearrangement of Ene-cyclopropenes. Divergent Reaction Pathways. J Org Chem 2019; 84:924-933. [PMID: 30588814 DOI: 10.1021/acs.joc.8b02849] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction of ene-cyclopropenes with Cp*RuCl(cod) leads to alkenyl bicyclo[3.1.0]hexanes, bicyclo[4.1.0]heptanes, and bicyclo[5.1.0]octanes. This reaction involves a reverse regioselectivity in the cyclopropene opening than with gold chlorides. With gem-disubstituted cyclopropenes, a novel cycloisomerization based on ring-opening nucleophilic attack and rearrangement is observed. Alternatively, some gem-disubstituted cyclopropenes give dimerizations of the intermediate carbene.
Collapse
Affiliation(s)
- Alberto López-Rodríguez
- Facultad de Farmacia, Dpto. Química y Bioquímica , Universidad San Pablo CEU , Urb. Montepríncipe, Boadilla del Monte , 28668 Madrid , Spain
| | - Gema Domínguez
- Facultad de Farmacia, Dpto. Química y Bioquímica , Universidad San Pablo CEU , Urb. Montepríncipe, Boadilla del Monte , 28668 Madrid , Spain
| | - Javier Pérez-Castells
- Facultad de Farmacia, Dpto. Química y Bioquímica , Universidad San Pablo CEU , Urb. Montepríncipe, Boadilla del Monte , 28668 Madrid , Spain
| |
Collapse
|
42
|
Hu L, Shen PX, Shao Q, Hong K, Qiao JX, Yu JQ. Pd II -Catalyzed Enantioselective C(sp 3 )-H Activation/Cross-Coupling Reactions of Free Carboxylic Acids. Angew Chem Int Ed Engl 2019; 58:2134-2138. [PMID: 30536546 DOI: 10.1002/anie.201813055] [Citation(s) in RCA: 102] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Indexed: 02/04/2023]
Abstract
PdII -catalyzed enantioselective C(sp3 )-H cross-coupling of free carboxylic acids with organoborons has been realized using either mono-protected amino acid (MPAA) ligands or mono-protected aminoethyl amine (MPAAM) ligands. A diverse range of aryl- and vinyl-boron reagents can be used as coupling partners to provide chiral carboxylic acids. This reaction provides an alternative approach to the enantioselective synthesis of cyclopropanecarboxylic acids and cyclobutanecarboxylic acids containing α-chiral tertiary and quaternary stereocenters. The utility of this reaction was further demonstrated by converting the carboxylic acid into cyclopropyl amine without loss of optical activity.
Collapse
Affiliation(s)
- Liang Hu
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Peng-Xiang Shen
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Qian Shao
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Kai Hong
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Jennifer X Qiao
- Discovery Chemistry, Bristol-Myers Squibb Company, P.O. Box 4000, Princeton, NJ, 08543, USA
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| |
Collapse
|
43
|
Tugny C, Zhang FG, Marek I. Versatility in the Brook Rearrangement for the Selective Ring-Opening of Three-Membered Rings. Chemistry 2019; 25:205-209. [PMID: 30294820 DOI: 10.1002/chem.201805006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Indexed: 12/21/2022]
Abstract
From a single α-silylated carbinol intermediate, easily accessible by carbometallation of cyclopropenes, various scaffolds featuring a quaternary carbon stereocenter could be obtained selectively. The selectivity towards these different products was achieved by either changing the experimental conditions or the nature of the organometallic species involved.
Collapse
Affiliation(s)
- Coralie Tugny
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
| | - Fa-Guang Zhang
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
| |
Collapse
|
44
|
He F, Koenigs RM. Visible light mediated, metal-free carbene transfer reactions of diazoalkanes with propargylic alcohols. Chem Commun (Camb) 2019; 55:4881-4884. [DOI: 10.1039/c9cc00927b] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The photolysis of donor–acceptor diazoalkanes in the presence of propargylic alcohols furnishes valuable, sterically demanding tetra-substituted cyclopropenes in high yield under metal-free conditions.
Collapse
Affiliation(s)
- Feifei He
- RWTH Aachen University
- Institute of Organic Chemistry
- D-52074 Aachen
- Germany
| | - Rene M. Koenigs
- RWTH Aachen University
- Institute of Organic Chemistry
- D-52074 Aachen
- Germany
| |
Collapse
|
45
|
Hommelsheim R, Guo Y, Yang Z, Empel C, Koenigs RM. Durch blaues Licht induzierte Carbentransferreaktionen von Diazoalkanen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811991] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Renè Hommelsheim
- Institut für Organische ChemieRWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Yujing Guo
- Institut für Organische ChemieRWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Zhen Yang
- Institut für Organische ChemieRWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Claire Empel
- Institut für Organische ChemieRWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Rene M. Koenigs
- Institut für Organische ChemieRWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| |
Collapse
|
46
|
Mato M, García‐Morales C, Echavarren AM. Generation of Gold(I) Carbenes by Retro‐Buchner Reaction: From Cyclopropanes to Natural Products Synthesis. ChemCatChem 2018. [DOI: 10.1002/cctc.201801201] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Mauro Mato
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology (BIST) Av. Països Catalans 16 43007 Tarragona Spain
- Departament de Química Analítica i Química OrgànicaUniversitat Rovira i Virgili C/Marcel⋅li Domingo s/n 43007 Tarragona Spain
| | - Cristina García‐Morales
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology (BIST) Av. Països Catalans 16 43007 Tarragona Spain
- Departament de Química Analítica i Química OrgànicaUniversitat Rovira i Virgili C/Marcel⋅li Domingo s/n 43007 Tarragona Spain
| | - Antonio M. Echavarren
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology (BIST) Av. Països Catalans 16 43007 Tarragona Spain
- Departament de Química Analítica i Química OrgànicaUniversitat Rovira i Virgili C/Marcel⋅li Domingo s/n 43007 Tarragona Spain
| |
Collapse
|
47
|
Cormier M, de la Torre A, Marek I. Total Synthesis of C30 Botryococcene and
epi
‐Botryococcene by a Diastereoselective Ring Opening of Alkenylcyclopropanes. Angew Chem Int Ed Engl 2018; 57:13237-13241. [DOI: 10.1002/anie.201808709] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Revised: 08/22/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Morgan Cormier
- Technion—Israel Institute of TechnologySchulich Faculty of Chemistry Technion City Haifa 32000 Israel
| | - Aurélien de la Torre
- Technion—Israel Institute of TechnologySchulich Faculty of Chemistry Technion City Haifa 32000 Israel
| | - Ilan Marek
- Technion—Israel Institute of TechnologySchulich Faculty of Chemistry Technion City Haifa 32000 Israel
| |
Collapse
|
48
|
Cormier M, de la Torre A, Marek I. Total Synthesis of C30 Botryococcene and
epi
‐Botryococcene by a Diastereoselective Ring Opening of Alkenylcyclopropanes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808709] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Morgan Cormier
- Technion—Israel Institute of TechnologySchulich Faculty of Chemistry Technion City Haifa 32000 Israel
| | - Aurélien de la Torre
- Technion—Israel Institute of TechnologySchulich Faculty of Chemistry Technion City Haifa 32000 Israel
| | - Ilan Marek
- Technion—Israel Institute of TechnologySchulich Faculty of Chemistry Technion City Haifa 32000 Israel
| |
Collapse
|
49
|
Bruffaerts J, Pierrot D, Marek I. Efficient and stereodivergent synthesis of unsaturated acyclic fragments bearing contiguous stereogenic elements. Nat Chem 2018; 10:1164-1170. [PMID: 30150723 PMCID: PMC6197432 DOI: 10.1038/s41557-018-0123-7] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Accepted: 07/10/2018] [Indexed: 12/29/2022]
Abstract
Synthetic organic strategies that enable the catalytic and rapid assembly of a large array of organic compounds possessing multiple stereocenters in acyclic systems are somewhat rare, especially when it comes to reaching today’s high standards of efficiency and selectivity. In particular, the catalytic preparation of a three-dimensional molecular layout of a simple acyclic hydrocarbon skeleton possessing several stereocenters from simple and readily available reagents still represents a vastly uncharted domain. Here, we report a rapid, modular, stereodivergent and diversity-oriented unified strategy to construct acyclic molecular frameworks bearing up to four contiguous and congested stereogenic elements, with remarkably high levels of stereocontrol and in only three catalytic steps from commercially available alkynes. A regio- and diastereoselective catalytic Heck migratory insertion reaction of alkenylcyclopropyl carbinols merging selective C–C bond cleavage of a cyclopropane represents the key step.
Collapse
Affiliation(s)
- Jeffrey Bruffaerts
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, Israel
| | - David Pierrot
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, Israel
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, Israel.
| |
Collapse
|
50
|
Mato M, Herlé B, Echavarren AM. Cyclopropanation by Gold- or Zinc-Catalyzed Retro-Buchner Reaction at Room Temperature. Org Lett 2018; 20:4341-4345. [PMID: 29975067 DOI: 10.1021/acs.orglett.8b01791] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Through the design of a second generation of more reactive 7-substituted 1,3,5-cycloheptatrienes, a room-temperature gold(I)-catalyzed retro-Buchner-cyclopropanation sequence and the first zinc(II)-catalyzed version of this process, which uses inexpensive ZnBr2 as catalyst, have been developed. This led to a broad-scope cyclopropanation of both activated and unactivated alkenes, including late-stage derivatization of biologically relevant compounds, and to the total synthesis of (±)-lactobacillic acid.
Collapse
Affiliation(s)
- Mauro Mato
- Institute of Chemical Research of Catalonia (ICIQ) , Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , C/Marcel·li Domingo s/n , 43007 Tarragona , Spain
| | - Bart Herlé
- Institute of Chemical Research of Catalonia (ICIQ) , Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Antonio M Echavarren
- Institute of Chemical Research of Catalonia (ICIQ) , Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , C/Marcel·li Domingo s/n , 43007 Tarragona , Spain
| |
Collapse
|