101
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Yang F, Jin Y, Wang C. Nickel-Catalyzed Asymmetric Intramolecular Reductive Heck Reaction of Unactivated Alkenes. Org Lett 2019; 21:6989-6994. [DOI: 10.1021/acs.orglett.9b02577] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Feiyan Yang
- Hefei National Laboratory for Physical Science at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China
| | - Youxiang Jin
- Hefei National Laboratory for Physical Science at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China
| | - Chuan Wang
- Hefei National Laboratory for Physical Science at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China
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102
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Chen YH, He JB, Bai X, Li XN, Lu LF, Liu YC, Zhang KQ, Li SH, Niu XM. Unexpected Biosynthesis of Fluorescein-Like Arthrocolins against Resistant Strains in an Engineered Escherichia coli. Org Lett 2019; 21:6499-6503. [PMID: 31343888 DOI: 10.1021/acs.orglett.9b02371] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Here we provide an unprecedented biofactory where fluorescent dye-like complex xanthenes could be produced in an engineered Escherichia coli. Feeding the strain with toluquinol or hydroquinones resulted in production of novel "unnatural" natural products including four arthrocolins embedded with indolyltriphenyl quaternary carbons. Arthrocolins A-C potently inhibited various human cancer cell lines including paclitaxel-resistant cell line A549/Taxol and methicillin-resistant Staphylococcus aureus and immensely restored the sensitivity of intractable fluconazole-resistant human pathogen Candida albicans to fluconazole.
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Affiliation(s)
- Yong-Hong Chen
- State Key Laboratory for Conservation and Utilization of Bio-Resources & Key Laboratory for Microbial Resources of the Ministry of Education, School of Life Sciences , Yunnan University , Kunming 650091 , P.R. China
| | - Jiang-Bo He
- State Key Laboratory for Conservation and Utilization of Bio-Resources & Key Laboratory for Microbial Resources of the Ministry of Education, School of Life Sciences , Yunnan University , Kunming 650091 , P.R. China.,Kunming Key Laboratory of Respiratory Disease , Kunming University , Kunming 650214 , P. R. China
| | - Xue Bai
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , P.R. China
| | - Xiao-Nian Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , P.R. China
| | - Lan-Feng Lu
- State Key Laboratory for Conservation and Utilization of Bio-Resources & Key Laboratory for Microbial Resources of the Ministry of Education, School of Life Sciences , Yunnan University , Kunming 650091 , P.R. China
| | - Yan-Chun Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , P.R. China
| | - Ke-Qin Zhang
- State Key Laboratory for Conservation and Utilization of Bio-Resources & Key Laboratory for Microbial Resources of the Ministry of Education, School of Life Sciences , Yunnan University , Kunming 650091 , P.R. China
| | - Sheng-Hong Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , P.R. China
| | - Xue-Mei Niu
- State Key Laboratory for Conservation and Utilization of Bio-Resources & Key Laboratory for Microbial Resources of the Ministry of Education, School of Life Sciences , Yunnan University , Kunming 650091 , P.R. China
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103
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Dongbang S, Shen Z, Ellman JA. Synthesis of Homoallylic Alcohols with Acyclic Quaternary Centers through Co
III
‐Catalyzed Three‐Component C−H Bond Addition to Internally Substituted Dienes and Carbonyls. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906633] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sun Dongbang
- Department of ChemistryYale University 225 Prospect St. New Haven CT 06520 USA
| | - Zican Shen
- Department of ChemistryYale University 225 Prospect St. New Haven CT 06520 USA
| | - Jonathan A. Ellman
- Department of ChemistryYale University 225 Prospect St. New Haven CT 06520 USA
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104
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Dongbang S, Shen Z, Ellman JA. Synthesis of Homoallylic Alcohols with Acyclic Quaternary Centers through Co III -Catalyzed Three-Component C-H Bond Addition to Internally Substituted Dienes and Carbonyls. Angew Chem Int Ed Engl 2019; 58:12590-12594. [PMID: 31310435 DOI: 10.1002/anie.201906633] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/02/2019] [Indexed: 11/09/2022]
Abstract
An efficient CoIII -catalyzed three-component strategy to prepare homoallylic alcohols containing acyclic quaternary centers is disclosed. This transformation enables the introduction of two C-C σ bonds through C-H bond activation and sequential addition to internally substituted dienes and a wide range of aldehydes and activated ketones. Isoprene and other internally monosubstituted dienes are effective inputs, with the reaction proceeding with high diastereoselectivity for those substrate combinations that result in more than one stereogenic center. Moreover, the opposite relative stereochemistry can be achieved by employing 1,2-disubstituted dienes. A mechanism for the transformation is proposed based upon the relative stereochemistry of the products and studies with isotopically labeled starting materials.
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Affiliation(s)
- Sun Dongbang
- Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT, 06520, USA
| | - Zican Shen
- Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT, 06520, USA
| | - Jonathan A Ellman
- Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT, 06520, USA
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105
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O’Broin CQ, Guiry PJ. Construction of All-Carbon Quaternary Stereocenters by Palladium-Catalyzed Decarboxylative Propargylation. Org Lett 2019; 21:5402-5406. [DOI: 10.1021/acs.orglett.9b01493] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Calvin Q. O’Broin
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Patrick J. Guiry
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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106
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Thorve PR, Guru MM, Maji B. Manganese-Catalyzed Divergent Markovnikov Addition and [2+2+2] Cycloaddition of 2-Carbonyl Indanone with Terminal Alkyne. J Org Chem 2019; 84:8185-8193. [PMID: 31149821 DOI: 10.1021/acs.joc.9b01173] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Herein, we report on manganese-catalyzed regioselective Markovnikov addition and [2+2+2] cycloaddition of 2-carbonyl indanones with terminal alkynes. This method provides an efficient approach for the construction of all-carbon quaternary centers and complex polycyclic hydrocarbon frameworks by the formation of new carbon-carbon single bonds in a regio- and stereoselective manner. Preliminary mechanistic experiments involving deuterium labeling, kinetic, catalytic, and stoichiometric reactions with plausible intermediates were performed to shed light on the reaction mechanism.
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Affiliation(s)
- Pradip Ramdas Thorve
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur 741246 , India
| | - Murali Mohan Guru
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur 741246 , India
| | - Biplab Maji
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur 741246 , India
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107
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Zanghi JM, Liu S, Meek SJ. Enantio- and Diastereoselective Synthesis of Functionalized Carbocycles by Cu-Catalyzed Borylative Cyclization of Alkynes with Ketones. Org Lett 2019; 21:5172-5177. [PMID: 31199654 DOI: 10.1021/acs.orglett.9b01769] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A single-pot Cu-catalyzed enantio- and diastereoselective tandem hydroboration/borylative cyclization of alkynes with ketones for the synthesis of carbocycles is reported. The reaction proceeds via desymmetrization and generates four contiguous stereocenters, including an all-carbon quaternary center. The method provides rapid access to [6,5]- and [5,5]-bicycles and cyclopentane products. Catalyst-controlled diastereoselectivity by selection of bisphosphine ligand is noted. Utility of the products is demonstrated by site- and chemoselective transformations that afford valuable alkenyl and allyl organoborons.
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Affiliation(s)
- Joseph M Zanghi
- Department of Chemistry , The University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599-3290 , United States
| | - Shuang Liu
- Department of Chemistry , The University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599-3290 , United States
| | - Simon J Meek
- Department of Chemistry , The University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599-3290 , United States
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108
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Hirama N, Sakamoto R, Maruoka K. Synthesis of α‐Quaternary Aldehydes via a Stereoselective Semi‐Pinacol Rearrangement of Optically Active Epoxy Alcohols. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900299] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Naomichi Hirama
- Department of Chemistry Graduate School of ScienceKyoto University Sakyo, Kyoto 606-8502 Japan
| | - Ryu Sakamoto
- Department of Chemistry Graduate School of ScienceKyoto University Sakyo, Kyoto 606-8502 Japan
| | - Keiji Maruoka
- Department of Chemistry Graduate School of ScienceKyoto University Sakyo, Kyoto 606-8502 Japan
- School of Chemical Engineering and Light IndustryGuangdong University of Technology China
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109
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Alexy EJ, Fulton TJ, Zhang H, Stoltz BM. Palladium-catalyzed enantioselective decarboxylative allylic alkylation of fully substituted N-acyl indole-derived enol carbonates. Chem Sci 2019; 10:5996-6000. [PMID: 31360407 PMCID: PMC6566452 DOI: 10.1039/c9sc01726g] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 04/26/2019] [Indexed: 01/06/2023] Open
Abstract
The first enantioselective Pd-catalyzed decarboxylative allylic alkylation of fully substituted N-acyl indole-derived enol carbonates generates acyclic all-carbon quaternary stereocenters in excellent yields (up to 99%) and enantioselectivities (up to 98% ee) using a new electron-deficient phosphinoxazoline (PHOX) ligand.
The first enantioselective palladium-catalyzed decarboxylative allylic alkylation of fully substituted N-acyl indole-derived enol carbonates forming acyclic all-carbon quaternary stereocenters is reported. Excellent yields up to 99% and enantioselectivities up to 98% ee are obtained through the use of a new electron-deficient phosphinoxazoline (PHOX) ligand. Control of substrate enolate geometry is crucial for high selectivity. The obtained α-quaternary N-acyl indoles are formal ester equivalents, and represent a useful handle for further synthetic transformations.
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Affiliation(s)
- Eric J Alexy
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , CA 91125 , USA .
| | - Tyler J Fulton
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , CA 91125 , USA .
| | - Haiming Zhang
- Small Molecule Process Chemistry, Genentech, Inc. , 1 DNA Way , South San Francisco , CA 94080 , USA .
| | - Brian M Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , CA 91125 , USA .
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110
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Jin Y, Wang C. Nickel‐Catalyzed Asymmetric Reductive Arylalkylation of Unactivated Alkenes. Angew Chem Int Ed Engl 2019; 58:6722-6726. [DOI: 10.1002/anie.201901067] [Citation(s) in RCA: 113] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 02/22/2019] [Indexed: 12/18/2022]
Affiliation(s)
- Youxiang Jin
- Hefei National Laboratory for Physical Science at the Microscale Department of ChemistryCenter for Excellence in Molecular SynthesisUniversity of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 P. R. China
| | - Chuan Wang
- Hefei National Laboratory for Physical Science at the Microscale Department of ChemistryCenter for Excellence in Molecular SynthesisUniversity of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 P. R. China
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111
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Shi L, He Y, Gong J, Yang Z. Pd‐Catalyzed Decarboxylative Allylation for Stereoselective Syntheses of Allylic Alcohols bearing a Quaternary Carbon Center. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900208] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Linlin Shi
- State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Genomics School of Chemical Biology and BiotechnologyPeking University Shenzhen Graduate School Shenzhen 518055 China
| | - Yingdong He
- State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Genomics School of Chemical Biology and BiotechnologyPeking University Shenzhen Graduate School Shenzhen 518055 China
| | - Jianxian Gong
- State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Genomics School of Chemical Biology and BiotechnologyPeking University Shenzhen Graduate School Shenzhen 518055 China
| | - Zhen Yang
- State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Genomics School of Chemical Biology and BiotechnologyPeking University Shenzhen Graduate School Shenzhen 518055 China
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Beijing National Laboratory for Molecular Science College of Chemistry and Molecular Engineering, and Peking-Tsing hua Center for Life SciencesPeking University Beijing 100871 China
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112
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Zhang HJ, Xie YC, Yin L. Copper(I)-catalyzed asymmetric decarboxylative Mannich reaction enabled by acidic activation of 2H-azirines. Nat Commun 2019; 10:1699. [PMID: 30979892 PMCID: PMC6461707 DOI: 10.1038/s41467-019-09750-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 03/29/2019] [Indexed: 12/26/2022] Open
Abstract
Chiral aziridines are structure units found in many biologically active compounds and are important building blocks in organic synthesis. Herein, by merging nucleophilic generation through copper(I)-catalyzed decarboxylation and activation of poorly electrophilic 2H-azirines through protonation with carboxylic acids, an asymmetric decarboxylative Mannich reaction between α,α-disubstituted cyanoacetic acids and 2H-azirines is uncovered, which leads to generation of chiral aziridines containing vicinal tetrasubstituted and acyclic quaternary stereogenic carbon centers in good to excellent diastereo- and enantioselectivities. At last, transformations of the produced chiral aziridine are successfully carried out to deliver synthetically useful compounds. Due to their poor electrophilicity, 2H-azirines do not easily react with nucleophiles. Here, the authors show an acidic activation of 2H-azirines by cyanoacetic acid coupling partners affording chiral aziridines containing vicinal tetrasubstituted and acyclic quaternary stereogenic carbon centers.
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Affiliation(s)
- Hai-Jun Zhang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Yan-Cheng Xie
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Liang Yin
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China.
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113
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Jin Y, Wang C. Nickel‐Catalyzed Asymmetric Reductive Arylalkylation of Unactivated Alkenes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901067] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Youxiang Jin
- Hefei National Laboratory for Physical Science at the Microscale Department of ChemistryCenter for Excellence in Molecular SynthesisUniversity of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 P. R. China
| | - Chuan Wang
- Hefei National Laboratory for Physical Science at the Microscale Department of ChemistryCenter for Excellence in Molecular SynthesisUniversity of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 P. R. China
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114
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Affiliation(s)
- Laura Castoldi
- University of Vienna, Department of Pharmaceutical Chemistry, Vienna, Austria
| | - Vittorio Pace
- University of Vienna, Department of Pharmaceutical Chemistry, Vienna, Austria.
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115
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Monticelli S, Holzer W, Langer T, Roller A, Olofsson B, Pace V. Sustainable Asymmetric Organolithium Chemistry: Enantio- and Chemoselective Acylations through Recycling of Solvent, Sparteine, and Weinreb "Amine". CHEMSUSCHEM 2019; 12:1147-1154. [PMID: 30614208 PMCID: PMC6704367 DOI: 10.1002/cssc.201802815] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 12/20/2018] [Indexed: 05/10/2023]
Abstract
The well-established Hoppe-Beak chemistry, which involves enantioselective generation of organolithium compounds in the presence of (-)-sparteine, was revisited and applied to unprecedented acylations with Weinreb amides to access highly enantioenriched α-oxyketones and cyclic α-aminoketones. Recycling of the sustainable solvent cyclopentyl methyl ether, sparteine, and the released Weinreb "amine" [HNMe(OMe)] was possible through a simple work-up procedure that enabled full recovery of these precious materials. The methodology features a robust scope and flexibility, thus allowing the enantioselective preparation of scaffolds amenable of further derivatization.
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Affiliation(s)
- Serena Monticelli
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse,14Vienna1090Austria
| | - Wolfgang Holzer
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse,14Vienna1090Austria
| | - Thierry Langer
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse,14Vienna1090Austria
| | - Alexander Roller
- X-Ray Structure Analysis CenterUniversity of ViennaWaehringerstrasse 42Vienna1090Austria
| | - Berit Olofsson
- Department of Organic Chemistry, Arrhenius LaboratoryStockholm UniversitySe-106 91StockholmSweden
| | - Vittorio Pace
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse,14Vienna1090Austria
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116
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Alkynes as Synthetic Equivalents of Ketones and Aldehydes: A Hidden Entry into Carbonyl Chemistry. Molecules 2019; 24:molecules24061036. [PMID: 30875972 PMCID: PMC6471418 DOI: 10.3390/molecules24061036] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/08/2019] [Accepted: 03/11/2019] [Indexed: 11/16/2022] Open
Abstract
The high energy packed in alkyne functional group makes alkyne reactions highly thermodynamically favorable and generally irreversible. Furthermore, the presence of two orthogonal π-bonds that can be manipulated separately enables flexible synthetic cascades stemming from alkynes. Behind these "obvious" traits, there are other more subtle, often concealed aspects of this functional group's appeal. This review is focused on yet another interesting but underappreciated alkyne feature: the fact that the CC alkyne unit has the same oxidation state as the -CH2C(O)- unit of a typical carbonyl compound. Thus, "classic carbonyl chemistry" can be accessed through alkynes, and new transformations can be engineered by unmasking the hidden carbonyl nature of alkynes. The goal of this review is to illustrate the advantages of using alkynes as an entry point to carbonyl reactions while highlighting reports from the literature where, sometimes without full appreciation, the concept of using alkynes as a hidden entry into carbonyl chemistry has been applied.
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117
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Schwartz LA, Holmes M, Brito GA, Gonçalves TP, Richardson J, Ruble JC, Huang KW, Krische MJ. Cyclometalated Iridium-PhanePhos Complexes Are Active Catalysts in Enantioselective Allene-Fluoral Reductive Coupling and Related Alcohol-Mediated Carbonyl Additions That Form Acyclic Quaternary Carbon Stereocenters. J Am Chem Soc 2019; 141:2087-2096. [PMID: 30681850 PMCID: PMC6423978 DOI: 10.1021/jacs.8b11868] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Iridium complexes modified by the chiral phosphine ligand PhanePhos catalyze the 2-propanol-mediated reductive coupling of diverse 1,1-disubstituted allenes 1a-1u with fluoral hydrate 2a to form CF3-substituted secondary alcohols 3a-3u that incorporate acyclic quaternary carbon-containing stereodiads. By exploiting concentration-dependent stereoselectivity effects related to the interconversion of kinetic ( Z)- and thermodynamic ( E)-σ-allyliridium isomers, adducts 3a-3u are formed with complete levels of branched regioselectivity and high levels of anti-diastereo- and enantioselectivity. The utility of this method for construction of CF3-oxetanes and CF3-azetidines is illustrated by the formation of 4a and 6a, respectively. Studies of the reaction mechanism aimed at illuminating the singular effectiveness of PhanePhos as a supporting ligand in this and related transformations have led to the identification of a chromatographically stable cyclometalated iridium-( R)-PhanePhos complex, Ir-PP-I, that is catalytically competent for allene-fluoral reductive coupling and previously reported transfer hydrogenative C-C couplings of dienes or CF3-allenes with methanol. Deuterium labeling studies, reaction progress kinetic analysis (RPKA) and computational studies corroborate a catalytic mechanism involving rapid allene hydrometalation followed by turnover-limiting carbonyl addition. A computationally determined stereochemical model shows that the ortho-CH2 group of the cyclometalated iridium-PhanePhos complex plays a key role in directing diastereo- and enantioselectivity. The collective data provide key insights into the structural-interactional features of allyliridium complexes required to enforce nucleophilic character, which should inform the design of related cyclometalated catalysts for umpoled allylation.
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Affiliation(s)
- Leyah A Schwartz
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Michael Holmes
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Gilmar A Brito
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Théo P Gonçalves
- KAUST Catalysis Center and Division of Physical Sciences and Engineering , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Jeffery Richardson
- Discovery Chemistry Research and Technologies , Eli Lilly and Company Limited , Erl Wood Manor , Windlesham , Surrey GU20 6PH , United Kingdom
| | - J Craig Ruble
- Discovery Chemistry Research and Technologies , Eli Lilly and Company , Indianapolis , Indiana 46285 , United States
| | - Kuo-Wei Huang
- KAUST Catalysis Center and Division of Physical Sciences and Engineering , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Michael J Krische
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
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118
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Ielo L, Touqeer S, Roller A, Langer T, Holzer W, Pace V. Telescoped, Divergent, Chemoselective C1 and C1-C1 Homologation of Imine Surrogates: Access to Quaternary Chloro- and Halomethyl-Trifluoromethyl Aziridines. Angew Chem Int Ed Engl 2019; 58:2479-2484. [PMID: 30548145 PMCID: PMC6582437 DOI: 10.1002/anie.201812525] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Indexed: 12/30/2022]
Abstract
A conceptually novel, high‐yielding, mono‐ or bis‐homologation was realized with lithium halocarbenoids and enables the one‐step, fully chemocontrolled assembly of a new class of quaternary trifluoromethyl aziridines. Trifluoroacetimidoyl chlorides (TFAICs) act as convenient electrophilic platforms, enabling the addition of either one or two homologating elements by simply controlling the stoichiometry of the process. Mechanistic studies highlighted that the homologation event, carried out with two different carbenoids (LiCH2Cl and LiCH2F), leads to fluoromethyl analogues in which the first nucleophile is employed for constructing the cycle and the second for decorating the resulting molecular architecture.
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Affiliation(s)
- Laura Ielo
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, 1090, Vienna, Austria
| | - Saad Touqeer
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, 1090, Vienna, Austria
| | - Alexander Roller
- University of Vienna, X-Ray Structure Analysis Center, Waehringerstrasse 42, 1090, Vienna, Austria
| | - Thierry Langer
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, 1090, Vienna, Austria
| | - Wolfgang Holzer
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, 1090, Vienna, Austria
| | - Vittorio Pace
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, 1090, Vienna, Austria
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119
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Song T, Arseniyadis S, Cossy J. Asymmetric Synthesis of α-Quaternary γ-Lactams through Palladium-Catalyzed Asymmetric Allylic Alkylation. Org Lett 2019; 21:603-607. [DOI: 10.1021/acs.orglett.8b03613] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Tao Song
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI), ESPCI Paris/CNRS/PSL Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Stellios Arseniyadis
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI), ESPCI Paris/CNRS/PSL Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
- Queen Mary University of London, School of Biological and Chemical Sciences, Mile End Road, London, E1 4NS, U.K
| | - Janine Cossy
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI), ESPCI Paris/CNRS/PSL Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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120
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Desymmetrization of meso-bisphosphates using copper catalysis and alkylzirconocene nucleophiles. Nat Commun 2019; 10:21. [PMID: 30604753 PMCID: PMC6318275 DOI: 10.1038/s41467-018-07871-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 11/30/2018] [Indexed: 01/30/2023] Open
Abstract
The desymmetrization of meso-compounds is a useful synthetic method, as illustrated by numerous applications of this strategy in natural product synthesis. Cu-catalyzed allylic desymmetrizations enable the enantioselective formation of carbon-carbon bonds, but these transformations are limited in substrate scope and by the use of highly reactive premade organometallic reagents at cryogenic temperatures. Here we show that diverse meso-bisphosphates in combination with alkylzirconium nucleophiles undergo highly regio-, diastereo- and enantio-selective Cu-catalyzed desymmetrization reactions. In addition, C2-symmetric chiral bisphosphates undergo stereospecific reactions and a racemic substrate undergoes a Cu-catalyzed kinetic resolution. The reaction tolerates functional groups incompatible with many common organometallic reagents and provides access to a broad range of functionalized carbo- and hetero-cyclic structures. The products bear up to three contiguous stereogenic centers, including quaternary centers and spirocyclic ring systems. We anticipate that the method will be a useful complement to existing catalytic enantioselective reactions.
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121
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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.
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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
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122
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Wang Y, Li Y, Lian M, Zhang J, Liu Z, Tang X, Yin H, Meng Q. Asymmetric α-alkylation of cyclic β-keto esters and β-keto amides by phase-transfer catalysis. Org Biomol Chem 2019; 17:573-584. [DOI: 10.1039/c8ob02669f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A facile and efficient asymmetric α-alkylation of β-keto esters and β-keto amides has been achieved by phase-transfer catalysis.
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Affiliation(s)
- Yakun Wang
- School of Pharmacy
- Xinxiang Medical University
- Xinxiang
- PR China
| | - Yueyun Li
- Xinxiang Central Hospital
- Xinxiang Medical University
- Xinxiang
- PR China
| | - Mingming Lian
- Department of Pharmaceutics
- Daqing Campus
- Harbin Medical University
- Daqing
- P. R. China
| | - Jixia Zhang
- School of Pharmacy
- Xinxiang Medical University
- Xinxiang
- PR China
| | - Zhaomin Liu
- School of Pharmacy
- Xinxiang Medical University
- Xinxiang
- PR China
| | - Xiaofei Tang
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian
- P. R. China
| | - Hang Yin
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian
- P. R. China
| | - Qingwei Meng
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian
- P. R. China
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123
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Hajra S, Maity S, Roy S, Maity R, Samanta S. Brønsted Acid Promoted Regioselective C-3 Arylation and Heteroarylation of Spiro-epoxyoxindoles for the Construction of All Carbon Quaternary Centres: A Detailed Study. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801524] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Saumen Hajra
- Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus; Centre of Biomedical Research; Raebareli Road, Lucknow 226014 India
| | - Subrata Maity
- Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus; Centre of Biomedical Research; Raebareli Road, Lucknow 226014 India
- Department of Chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur India
| | - Sayan Roy
- Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus; Centre of Biomedical Research; Raebareli Road, Lucknow 226014 India
| | - Ramkrishna Maity
- Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus; Centre of Biomedical Research; Raebareli Road, Lucknow 226014 India
| | - Srikrishna Samanta
- Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus; Centre of Biomedical Research; Raebareli Road, Lucknow 226014 India
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124
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Wang H, Qiu S, Wang S, Zhai H. Pd-Catalyzed Umpolung of π–Allylpalladium Intermediates: Assembly of All-Carbon α-Vinyl Quaternary Aldehydes through C(sp3)–C(sp3) Coupling. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03814] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Huifei Wang
- State Key Laboratory of Chemical Oncogenomics, Shenzhen Engineering Laboratory of Nano Drug Slow-Release, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Shuxian Qiu
- State Key Laboratory of Chemical Oncogenomics, Shenzhen Engineering Laboratory of Nano Drug Slow-Release, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Sasa Wang
- State Key Laboratory of Chemical Oncogenomics, Shenzhen Engineering Laboratory of Nano Drug Slow-Release, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Hongbin Zhai
- State Key Laboratory of Chemical Oncogenomics, Shenzhen Engineering Laboratory of Nano Drug Slow-Release, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
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125
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Shterenberg A, Haimov E, Smirnov P, Marek I. Convergent and flexible approach to stereodefined polyhydroxylated fragments. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.10.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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126
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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
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127
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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
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128
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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.
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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.
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129
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Wang C, Ge S. Versatile Cobalt-Catalyzed Enantioselective Entry to Boryl-Functionalized All-Carbon Quaternary Stereogenic Centers. J Am Chem Soc 2018; 140:10687-10690. [DOI: 10.1021/jacs.8b06814] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Chao Wang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Shaozhong Ge
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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130
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Alexy EJ, Zhang H, Stoltz BM. Catalytic Enantioselective Synthesis of Acyclic Quaternary Centers: Palladium-Catalyzed Decarboxylative Allylic Alkylation of Fully Substituted Acyclic Enol Carbonates. J Am Chem Soc 2018; 140:10109-10112. [PMID: 30049213 PMCID: PMC6103296 DOI: 10.1021/jacs.8b05560] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The first enantioselective palladium-catalyzed decarboxylative allylic alkylation of fully substituted acyclic enol carbonates providing linear α-quaternary ketones is reported. Investigation into the reaction revealed that the use of an electron-deficient phosphinooxazoline ligand renders the enolate geometry of the starting material inconsequential, with the same enantiomer of product obtained in the same level of selectivity regardless of the starting ratio of enolates. As a result, a general method toward acyclic all-carbon quaternary stereocenters has been developed.
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Affiliation(s)
- Eric J. Alexy
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Haiming Zhang
- Small Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Brian M. Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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131
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Kim-Lee SH, Alonso I, Mauleón P, Arrayás RG, Carretero JC. Rationalizing the Role of NaOtBu in Copper-Catalyzed Carboboration of Alkynes: Assembly of Allylic All-Carbon Quaternary Stereocenters. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02123] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Shin-Ho Kim-Lee
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
| | - Inés Alonso
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - Pablo Mauleón
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - Ramón Gómez Arrayás
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - Juan C. Carretero
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
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132
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James J, Akula R, Guiry PJ. Pd-Catalyzed Decarboxylative Asymmetric Protonation of Sterically Hindered α-Aryl Lactones and Dihydrocoumarins. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800724] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Jinju James
- Centre for Synthesis and Chemical Biology, School of Chemistry; University College Dublin, Belfield; Dublin 4 Ireland
| | - Ramulu Akula
- Synthesis & Solid State Pharmaceutical Centre (SSPC), School of Chemistry; University College Dublin, Belfield; Dublin 4 Ireland
| | - Patrick J. Guiry
- Centre for Synthesis and Chemical Biology, School of Chemistry; University College Dublin, Belfield; Dublin 4 Ireland
- Synthesis & Solid State Pharmaceutical Centre (SSPC), School of Chemistry; University College Dublin, Belfield; Dublin 4 Ireland
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133
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Mikušek J, Jansa P, Jagtap PR, Vašíček T, Císařová I, Matoušová E. Enantioselective Synthesis of All-Carbon Quaternary Centers Structurally Related to Amaryllidaceae Alkaloids. Chemistry 2018; 24:10069-10072. [PMID: 29775495 DOI: 10.1002/chem.201802493] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Indexed: 01/24/2023]
Abstract
Enantioselective synthesis of all-carbon quaternary centers remains a considerable challenge for synthetic organic chemists. Here, we report a two-step protocol to synthesize such centers including tandem cyclization/Suzuki cross-coupling followed by halocarbocyclization. During this process, two rings, three new C-C bonds and a stereochemically defined all-carbon quaternary center are formed. The absolute configuration of this center is controlled by the stereochemistry of the adjacent stereocenter, which derives from an appropriate enantioenriched starting material. Using this method, we synthesized polycyclic compounds structurally similar to Amaryllidaceae alkaloids in high enantiomeric excesses. Because these products resemble naturally occurring compounds, our protocol can be used to synthesize various potentially bioactive compounds.
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Affiliation(s)
- Jiří Mikušek
- Department of Organic Chemistry, Faculty of Science, Charles University, Praha, 128 43, Czech Republic
| | - Petr Jansa
- Department of Organic Chemistry, Faculty of Science, Charles University, Praha, 128 43, Czech Republic
| | - Pratap R Jagtap
- Department of Organic Chemistry, Faculty of Science, Charles University, Praha, 128 43, Czech Republic
| | - Tomáš Vašíček
- Department of Organic Chemistry, Faculty of Science, Charles University, Praha, 128 43, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Praha, 128 43, Czech Republic
| | - Eliška Matoušová
- Department of Organic Chemistry, Faculty of Science, Charles University, Praha, 128 43, Czech Republic
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134
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Shimizu M, Kikuchi J, Kondoh A, Terada M. Chiral Brønsted acid-catalyzed intramolecular S N2' reaction for enantioselective construction of a quaternary stereogenic center. Chem Sci 2018; 9:5747-5757. [PMID: 30079184 PMCID: PMC6050593 DOI: 10.1039/c8sc01942h] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 06/03/2018] [Indexed: 12/15/2022] Open
Abstract
Construction of a quaternary stereogenic center was accomplished through the enantioselective intramolecular allylic substitution reaction of bis-trichloroacetimidate catalyzed by a chiral phosphoramide derivative.
An enantioselective intramolecular anti-SN2′ cyclization reaction for the construction of a quaternary stereogenic center was accomplished through the activation of the leaving group using a binaphthol-derived phosphoramide as the chiral Brønsted acid catalyst. The present allylic substitution reaction is beneficial not only for the regioselective nucleophilic substitution at the multi-substituted site of the double bond but also for controlling the stereochemical outcome because of using a geometrically defined double bond. Indeed, the reaction afforded synthetically useful amino alcohol derivatives having a tetra-substituted carbon center in a highly enantioselective manner in most cases, in which the modification of the sulfonamide unit of the phosphoramide catalyst was demonstrated to improve the enantioselectivity. Experimental and theoretical elucidation of the reaction mechanism suggested that the reaction proceeds through a synchronous anti-SN2′ pathway, although NMR monitoring of the reaction indicated the formation of the phosphorimidate ester via the SN2 reaction of the catalyst with the substrate, which results in catalyst deactivation. Further theoretical studies of the origin of the stereochemical outcome at the generated quaternary stereogenic center were performed. Structural analysis of the transition states at the enantio-determining step revealed that the distinct discrimination of the substituents attached to the geometrically defined double bond is achieved by the anthryl and sulfonamide substituents of the catalyst through the three-point hydrogen bonding interactions and the T-shaped C–H···π interactions.
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Affiliation(s)
- Masahiro Shimizu
- Department of Chemistry , Graduate School of Science , Tohoku University , Aoba-ku , Sendai 980-8578 , Japan . ; ; Tel: +81-22-795-6602
| | - Jun Kikuchi
- Department of Chemistry , Graduate School of Science , Tohoku University , Aoba-ku , Sendai 980-8578 , Japan . ; ; Tel: +81-22-795-6602
| | - Azusa Kondoh
- Research and Analytical Center for Giant Molecules , Graduate School of Science , Tohoku University , Aoba-ku , Sendai 980-8578 , Japan
| | - Masahiro Terada
- Department of Chemistry , Graduate School of Science , Tohoku University , Aoba-ku , Sendai 980-8578 , Japan . ; ; Tel: +81-22-795-6602
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135
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Branched aldehydes as linchpins for the enantioselective and stereodivergent synthesis of 1,3-aminoalcohols featuring a quaternary stereocentre. Nat Catal 2018. [DOI: 10.1038/s41929-018-0093-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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136
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Castoldi L, Monticelli S, Senatore R, Ielo L, Pace V. Homologation chemistry with nucleophilic α-substituted organometallic reagents: chemocontrol, new concepts and (solved) challenges. Chem Commun (Camb) 2018; 54:6692-6704. [PMID: 29850663 DOI: 10.1039/c8cc02499e] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The transfer of a reactive nucleophilic CH2X unit into a preformed bond enables the introduction of a fragment featuring the exact and desired degree of functionalization through a single synthetic operation. The instability of metallated α-organometallic species often poses serious questions regarding the practicability of using this conceptually intuitive and simple approach for forming C-C or C-heteroatom bonds. A deep understanding of processes regulating the formation of these nucleophiles is a precious source of inspiration not only for successfully applying theoretically feasible transformations (i.e. determining how to employ a given reagent), but also for designing new reactions which ultimately lead to the introduction of molecular complexity via short experimental sequences.
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Affiliation(s)
- Laura Castoldi
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, A-1090, Vienna, Austria.
| | - Serena Monticelli
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, A-1090, Vienna, Austria.
| | - Raffaele Senatore
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, A-1090, Vienna, Austria.
| | - Laura Ielo
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, A-1090, Vienna, Austria.
| | - Vittorio Pace
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, A-1090, Vienna, Austria.
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137
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Singh S, Simaan M, Marek I. Pd-Catalyzed Selective Remote Ring Opening of Polysubstituted Cyclopropanols. Chemistry 2018; 24:8553-8557. [PMID: 29694690 DOI: 10.1002/chem.201802016] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Indexed: 12/14/2022]
Abstract
The distant functionalization of ω-ene cyclopropanols is induced by a Pd-catalyzed Heck reaction triggering a "metal-walk" and selective ring-opening of the three-membered ring. This approach provides a new class of acyclic aldehydes possessing concomitantly a stereodefined double bond and a quaternary carbon stereocenter α to the carbonyl group.
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Affiliation(s)
- Sukhdev Singh
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200009, Israel
| | - Marwan Simaan
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200009, Israel
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200009, Israel
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138
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Paderes MC, Siau WY, Rong Z, Zhao Y. Catalytic and Enantioselective Direct α-Alkylation of 3-Aryl and 3-Alkyl Oxindole Using Quinine-Derived Urea Catalyst. ChemistrySelect 2018. [DOI: 10.1002/slct.201800906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Monissa C. Paderes
- Department of Chemistry; National University of Singapore; 3 Science 3 Drive Singapore 117543
- Institute of Chemistry; University of the Philippines, Diliman; Quezon City Philippines 1101
| | - Woon Yew Siau
- Department of Chemistry; National University of Singapore; 3 Science 3 Drive Singapore 117543
| | - Ziqiang Rong
- Department of Chemistry; National University of Singapore; 3 Science 3 Drive Singapore 117543
| | - Yu Zhao
- Department of Chemistry; National University of Singapore; 3 Science 3 Drive Singapore 117543
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139
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Song T, Arseniyadis S, Cossy J. Highly Enantioselective, Base-Free Synthesis of α-Quaternary Succinimides through Catalytic Asymmetric Allylic Alkylation. Chemistry 2018; 24:8076-8080. [DOI: 10.1002/chem.201800920] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 03/27/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Tao Song
- Laboratoire de Chimie Organique, Institute of Chemistry; Biology and Innovation (CBI)-ESPCI Paris/CNRS, (UMR8231)/PSL* Research University; 10 rue Vauquelin 75231 Paris Cedex 05 France
| | - Stellios Arseniyadis
- Laboratoire de Chimie Organique, Institute of Chemistry; Biology and Innovation (CBI)-ESPCI Paris/CNRS, (UMR8231)/PSL* Research University; 10 rue Vauquelin 75231 Paris Cedex 05 France
- Queen Mary University of London; School of Biological and Chemical Sciences; Mile End Road London E1 4NS UK
| | - Janine Cossy
- Laboratoire de Chimie Organique, Institute of Chemistry; Biology and Innovation (CBI)-ESPCI Paris/CNRS, (UMR8231)/PSL* Research University; 10 rue Vauquelin 75231 Paris Cedex 05 France
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140
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Hojoh K, Shido Y, Ohmiya H, Sawamura M. Copper-catalyzed Enantioselective Intramolecular Alkylboron Allylic Alkylation. CHEM LETT 2018. [DOI: 10.1246/cl.180147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Kentaro Hojoh
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
| | - Yoshinori Shido
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
| | - Hirohisa Ohmiya
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Masaya Sawamura
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
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141
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Murai M, Uemura E, Takai K. Amine-Promoted anti-Markovnikov Addition of 1,3-Dicarbonyl Compounds with Terminal Alkynes under Rhenium Catalysis. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01338] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Masahito Murai
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Erika Uemura
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Kazuhiko Takai
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
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142
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Urban M, Franc M, Hofmanová M, Císařová I, Veselý J. The enantioselective addition of 1-fluoro-1-nitro(phenylsulfonyl)methane to isatin-derived ketimines. Org Biomol Chem 2018; 15:9071-9076. [PMID: 29083001 DOI: 10.1039/c7ob02408h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
An asymmetric organocatalytic addition of fluorinated phenylsulfonylnitromethane to isatin-derived ketimines was developed. The reaction was efficiently catalyzed by a chiral tertiary amine, cinchonine. This methodology provides a new type of optically active compound with two adjacent quaternary carbon stereocenters in good yield (up to 96%), with moderate diastereoselectivity (up to 5.7 : 1 dr) and excellent enantioselectivity (up to 98/96% ee).
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Affiliation(s)
- M Urban
- Department of Organic Chemistry, Charles University, Hlavova 8, 12843 Prague, Czech Republic.
| | - M Franc
- Department of Organic Chemistry, Charles University, Hlavova 8, 12843 Prague, Czech Republic.
| | - M Hofmanová
- Department of Organic Chemistry, Charles University, Hlavova 8, 12843 Prague, Czech Republic.
| | - I Císařová
- Department of Inorganic Chemistry, Charles University, Hlavova 8, 12843 Prague, Czech Republic
| | - J Veselý
- Department of Organic Chemistry, Charles University, Hlavova 8, 12843 Prague, Czech Republic.
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143
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Tian L, Gong L, Zhang X. Copper-Catalyzed Enantioselective Synthesis of β-Amino Alcohols Featuring Tetrasubstituted Tertiary Carbons. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701613] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Lan Tian
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University; Collaborative Innovation Center for Biotherapy; Chengdu People's Republic of China
| | - Liang Gong
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University; Collaborative Innovation Center for Biotherapy; Chengdu People's Republic of China
| | - Xia Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University; Collaborative Innovation Center for Biotherapy; Chengdu People's Republic of China
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144
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Zhao J, Jonker SJT, Meyer DN, Schulz G, Tran CD, Eriksson L, Szabó KJ. Copper-catalyzed synthesis of allenylboronic acids. Access to sterically encumbered homopropargylic alcohols and amines by propargylboration. Chem Sci 2018; 9:3305-3312. [PMID: 29732108 PMCID: PMC5915797 DOI: 10.1039/c7sc05123a] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 02/17/2018] [Indexed: 12/21/2022] Open
Abstract
Tri- and tetrasubstituted allenylboronic acids were prepared via a new versatile copper-catalyzed methodology. The densely functionalized allenylboronic acids readily undergo propargylboration reactions with ketones and imines without any additives. Catalytic asymmetric propargylborylation of ketones is demonstrated with high stereoselectivity allowing for the synthesis of highly enantioenriched tertiary homopropargyl alcohols. The reaction is suitable for kinetic resolution of racemic allenylboronic acids affording alkynes with adjacent quaternary stereocenters.
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Affiliation(s)
- Jian Zhao
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Sybrand J T Jonker
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Denise N Meyer
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Göran Schulz
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - C Duc Tran
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
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145
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Bruffaerts J, Vasseur A, Singh S, Masarwa A, Didier D, Oskar L, Perrin L, Eisenstein O, Marek I. Zirconocene-Mediated Selective C-C Bond Cleavage of Strained Carbocycles: Scope and Mechanism. J Org Chem 2018. [PMID: 29537856 DOI: 10.1021/acs.joc.7b03115] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Several approaches using organozirconocene species for the remote cleavage of strained three-membered ring carbocycles are described. ω-Ene polysubstituted cyclopropanes, alkylidenecyclopropanes, ω-ene spiro[2.2]pentanes, and ω-ene cyclopropyl methyl ethers were successfully transformed into stereodefined organometallic intermediates, allowing an easy access to highly stereoenriched acyclic scaffolds in good yields and, in most cases, excellent selectivities. DFT calculations and isotopic labeling experiments were performed to delineate the origin of the obtained chemo- and stereoselectivities, demonstrating the importance of microreversibility.
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Affiliation(s)
- Jeffrey Bruffaerts
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
| | - Alexandre Vasseur
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
| | - Sukhdev Singh
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
| | - Ahmad Masarwa
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
| | - Dorian Didier
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
| | - Liron Oskar
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
| | - Lionel Perrin
- CPE Lyon, INSA Lyon, ICBMS, CNRS UMR 5246 , Université de Lyon, Université Claude Bernard Lyon 1 , Equipe ITEMM, Bât. Curien, 43 Bd. du 11 Novembre 1918 , 69622 Villeurbanne , France
| | - Odile Eisenstein
- Institut Charles Gerhardt, UMR 5253, CNRS-UM-ENSCM , Université de Montpellier , cc 1501, Place E. Bataillon , 34095 Montpellier , France
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
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146
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Xu S, Liu B, Zhang ZM, Xu B, Zhang J. Copper(I)-Catalyzed Asymmetric [3+2]-Cycloaddition of α
-Substituted Iminoesters with α
-Trifluoromethyl α,
β
-Unsaturated Esters. CHINESE J CHEM 2018. [DOI: 10.1002/cjoc.201800070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Shan Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering; East China Normal University, 3663 North Zhongshan Road; Shanghai 200062 China
| | - Bing Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering; East China Normal University, 3663 North Zhongshan Road; Shanghai 200062 China
| | - Zhan-Ming Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering; East China Normal University, 3663 North Zhongshan Road; Shanghai 200062 China
| | - Bing Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering; East China Normal University, 3663 North Zhongshan Road; Shanghai 200062 China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering; East China Normal University, 3663 North Zhongshan Road; Shanghai 200062 China
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147
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Bang J, Oh C, Lee E, Jeong H, Lee J, Ryu JY, Kim J, Yu CM. A Regulation of Regiodivergent Routes for Enantioselective Aldol Addition of 2-Alkyl Allenoates with Aldehydes: α-Addition versus γ-Addition. Org Lett 2018; 20:1521-1525. [DOI: 10.1021/acs.orglett.8b00219] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiyun Bang
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Changhwa Oh
- Department of Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Eunhye Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Heejung Jeong
- Department of Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Junseong Lee
- Department of Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Ji Yeon Ryu
- Department of Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jimin Kim
- Department of Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Chan-Mo Yu
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
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148
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Haraguchi R, Kusakabe A, Mizutani N, Fukuzawa SI. Transition-Metal-Free Formylation of Allylzinc Reagents Leading to α-Quaternary Aldehydes. Org Lett 2018; 20:1613-1616. [DOI: 10.1021/acs.orglett.8b00360] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Ryosuke Haraguchi
- Department of Applied Chemistry, Institute of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Akinori Kusakabe
- Department of Applied Chemistry, Institute of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Nakaba Mizutani
- Department of Applied Chemistry, Institute of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Shin-ichi Fukuzawa
- Department of Applied Chemistry, Institute of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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149
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Construction of Isoxazolidin-5-ones with a Tetrasubstituted Carbon Center: Enantioselective Conjugate Addition Mediated by Phase-Transfer Catalysis. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800009] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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150
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Song ZY, Chen KQ, Chen XY, Ye S. Diastereo- and Enantioselective Synthesis of Spirooxindoles with Contiguous Tetrasubstituted Stereocenters via Catalytic Coupling of Two Tertiary Radicals. J Org Chem 2018; 83:2966-2970. [PMID: 29405713 DOI: 10.1021/acs.joc.7b03161] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The oxidative N-heterocyclic carbene-catalyzed [3 + 2] annulation of β,β-disubstituted enals and dioxindoles was developed, giving the spirocyclic oxindole-γ-lactones bearing two contiguous tetrasubstituted stereocenters in good yields with excellent diastereoselectivities and good enantioselectivities.
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Affiliation(s)
- Zhi-Yong Song
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.,University of Chinese Academy of Sciences , Beijing 100049, China
| | - Kun-Quan Chen
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.,University of Chinese Academy of Sciences , Beijing 100049, China
| | - Xiang-Yu Chen
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Song Ye
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.,University of Chinese Academy of Sciences , Beijing 100049, China
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