851
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Wang Y, Ji S, Wei K, Lin J. Epiandrosterone-derived prolinamide as an efficient asymmetric catalyst for Michael addition reactions of aldehydes to nitroalkenes. RSC Adv 2014. [DOI: 10.1039/c4ra03075c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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852
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Mehrparvar S, Balalaie S, Rabbanizadeh M, Rominger F, Ghabraie E. Synthesis of functionalized chromones through sequential reactions in aqueous media. Org Biomol Chem 2014; 12:5757-65. [PMID: 24968923 DOI: 10.1039/c4ob00618f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient sequential four-component reaction of chromone carbaldehydes, Meldrum's acid, 4-hydroxyl coumarin or 6-methyl-4-hydroxyl-pyrone and primary alcohols is reported which leads to 5a-i in aqueous media. Replacing the primary alcohol with isopropyl alcohol and tert-butyl alcohol results in different products 10 and 11. The environmentally friendly features, good to high yields and easy work-up are advantages of this approach.
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Affiliation(s)
- Saber Mehrparvar
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, P. O. Box 15875-4416, Tehran, Iran.
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853
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Wang S, Chai Z, Wei Y, Zhu X, Zhou S, Wang S. Lewis Acid Catalyzed Cascade Reaction to Carbazoles and Naphthalenes via Dehydrative [3 + 3]-Annulation. Org Lett 2014; 16:3592-5. [DOI: 10.1021/ol501605h] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Shaoyin Wang
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Institute of Organic Chemistry, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
- Department of Chemistry, Wannan Medical College, Wuhu, Anhui 241002, P. R. China
| | - Zhuo Chai
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Institute of Organic Chemistry, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
| | - Yun Wei
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Institute of Organic Chemistry, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
| | - Xiancui Zhu
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Institute of Organic Chemistry, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
| | - Shuangliu Zhou
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Institute of Organic Chemistry, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
| | - Shaowu Wang
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Institute of Organic Chemistry, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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854
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Chauhan P, Mahajan S, Loh CCJ, Raabe G, Enders D. Streocontrolled construction of six vicinal stereogenic centers on spiropyrazolones via organocascade Michael/Michael/1,2-addition reactions. Org Lett 2014; 16:2954-7. [PMID: 24840166 PMCID: PMC4699267 DOI: 10.1021/ol501093v] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A highly stereoselective one-pot procedure for the synthesis of spiropyrazolone derivatives bearing six contiguous stereogenic centers including two tetrasubstituted carbons has been developed. Under sequential catalysis by two organocatalysts, a cinchona-derived aminosquaramide and DBU, a series of diversely functionalized spiropyrazolones are obtained in good yields (47-62%) and excellent stereoselectivities (up to >25:1 dr and 98-99% ee). The opposite enantiomers of the spiropyrazolones are also accessible by employing a pseudoenantiomeric aminosquaramide catalyst.
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Affiliation(s)
- Pankaj Chauhan
- Institute of Organic Chemistry, RWTH Aachen University Landoltweg 1, 52074 Aachen, Germany
| | - Suruchi Mahajan
- Institute of Organic Chemistry, RWTH Aachen University Landoltweg 1, 52074 Aachen, Germany
| | - Charles C. J. Loh
- Institute of Organic Chemistry, RWTH Aachen University Landoltweg 1, 52074 Aachen, Germany
| | - Gerhard Raabe
- Institute of Organic Chemistry, RWTH Aachen University Landoltweg 1, 52074 Aachen, Germany
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University Landoltweg 1, 52074 Aachen, Germany
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855
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Hoveyda AH. Evolution of catalytic stereoselective olefin metathesis: from ancillary transformation to purveyor of stereochemical identity. J Org Chem 2014; 79:4763-92. [PMID: 24720633 PMCID: PMC4049245 DOI: 10.1021/jo500467z] [Citation(s) in RCA: 161] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Indexed: 12/21/2022]
Abstract
There have been numerous significant advances in catalytic olefin metathesis (OM) during the past two decades. Such progress has transformed this important set of reactions to strategically pivotal processes that generate stereochemical identity while delivering molecules that cannot be easily prepared by alternative routes. In this Perspective, an analysis of the origin of the inception of bidentate benzylidene ligands for Ru-based OM catalysts is first presented. This is followed by an overview of the intellectual basis that culminated in the development of Mo-based diolates and stereogenic-at-Ru complexes for enantioselective OM. The principles accrued from the study of the latter Ru carbenes and Mo alkylidenes and utilized in the design of stereogenic-at-Mo, -W, and -Ru species applicable to enantioselective and Z-selective OM are then discussed. The influence of the recently introduced catalytic OM protocols on the design of synthesis routes leading to complex organic molecules is probed. The impact of a better understanding of the mechanistic nuances of OM toward the discovery of stereoselective catalysts is reviewed as well.
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Affiliation(s)
- Amir H. Hoveyda
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
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856
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Joie C, Deckers K, Raabe G, Enders D. An Asymmetric Organocatalytic Quadruple Cascade to Tetraaryl-Substituted 2-Azabicyclo[3.3.0]octadienones. SYNTHESIS-STUTTGART 2014; 46:1539-1546. [PMID: 25278633 PMCID: PMC4178286 DOI: 10.1055/s-0033-1340982] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
A new asymmetric organocatalytic three-component quadruple cascade of α-ketoamides with α,β-unsaturated aldehydes is described. The reaction is catalyzed by the (S)-diphenylprolinol TMS ether catalyst and proceeds via an aza-Michael/aldol condensation/vinylogous Michael/aldol condensation sequence to yield tetraaryl-substituted 2-azabicyclo[3.3.0]octadienone derivatives. The cascade products are obtained with good to very good yields (34-71%), virtually complete diastereoselectivities (>20:1), and very good enantioselectivities (84-97%).
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Affiliation(s)
- Céline Joie
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Kristina Deckers
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Gerhard Raabe
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
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857
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Roudier M, Constantieux T, Quintard A, Rodriguez J. Enantioselective Cascade Formal Reductive Insertion of Allylic Alcohols into the C(O)–C Bond of 1,3-Diketones: Ready Access to Synthetically Valuable 3-Alkylpentanol Units. Org Lett 2014; 16:2802-5. [DOI: 10.1021/ol500821c] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Mylène Roudier
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397 Marseille, France
| | - Thierry Constantieux
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397 Marseille, France
| | - Adrien Quintard
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397 Marseille, France
| | - Jean Rodriguez
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397 Marseille, France
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858
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Lanier ML, Kasper AC, Kim H, Hong J. Synthesis of α,α'-trans-oxepanes through an organocatalytic oxa-conjugate addition reaction. Org Lett 2014; 16:2406-9. [PMID: 24724535 PMCID: PMC4018174 DOI: 10.1021/ol500773w] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
![]()
Oxepanes
are found in a wide range of natural products; however,
they are challenging synthetic targets due to enthalpic and entropic
barriers. Organocatalytic oxa-conjugate addition reactions promoted
by the gem-disubstituent (Thorpe–Ingold) effect
stereoselectively provided α,α′-trans-oxepanes. In addition, the potential of an organocatalytic tandem
oxa-conjugate addition/α-oxidation was demonstrated in a rapid
generation of molecular complexity. These organocatalytic oxa-conjugate
addition reactions would provide powerful tools for the synthesis
of natural products that contain highly functionalized oxepanes.
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Affiliation(s)
- Megan L Lanier
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
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859
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Shao PL, Liao JY, Ho YA, Zhao Y. Highly Diastereo- and Enantioselective Silver-Catalyzed Double [3+2] Cyclization of α-Imino Esters with Isocyanoacetate. Angew Chem Int Ed Engl 2014; 53:5435-9. [DOI: 10.1002/anie.201402788] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 03/22/2014] [Indexed: 01/20/2023]
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860
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Shao PL, Liao JY, Ho YA, Zhao Y. Highly Diastereo- and Enantioselective Silver-Catalyzed Double [3+2] Cyclization of α-Imino Esters with Isocyanoacetate. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402788] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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861
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Dong X, Sun J. Catalytic Asymmetric α-Aldol Reaction of Vinylogous N-Heterocyclic Carbene Enolates: Formation of Quaternary and Labile Tertiary Stereocenters. Org Lett 2014; 16:2450-3. [DOI: 10.1021/ol500830a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Xiuqin Dong
- Department
of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Jianwei Sun
- Department
of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
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862
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Li N, Liu GG, Chen J, Pan FF, Wu B, Wang XW. Regio- and Enantioselective Organocascade Michael-Michael Reactions: Construction of Chiral Trisubstituted Indanes. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301860] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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863
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Chouthaiwale PV, Tanaka F. Reactions of pyruvates: organocatalytic synthesis of functionalized dihydropyrans in one pot and further transformations to functionalized carbocycles and heterocycles. Chem Commun (Camb) 2014; 50:14881-4. [DOI: 10.1039/c4cc06035k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Concise cascade reactions of pyruvates with aldehydes that generate functionalized dihydropyran derivatives in one pot have been developed. The products, dihydropyrans, were further concisely transformed to various functionalized molecules.
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Affiliation(s)
- Pandurang V. Chouthaiwale
- Chemistry and Chemical Bioengineeing Unit
- Okinawa Institute of Science and Technology Graduate University
- Okinawa 904-0495, Japan
| | - Fujie Tanaka
- Chemistry and Chemical Bioengineeing Unit
- Okinawa Institute of Science and Technology Graduate University
- Okinawa 904-0495, Japan
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864
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Ransborg LK, Lykke L, Hammer N, Næsborg L, Jørgensen KA. An organocatalytic one-pot cascade incorporating the Achmatowicz reaction affording 3-pyrone derivatives. Chem Commun (Camb) 2014; 50:7604-6. [DOI: 10.1039/c4cc03815k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The development of an organocatalytic one-pot cascade for the annulation of simple starting materials: α,β-unsaturated aldehydes, hydrogen peroxide, β-carbonyl compounds and NBS to furnish optically active 3-pyrones in good yield and with excellent enantioselectivity is presented.
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Affiliation(s)
| | - Lennart Lykke
- Center for Catalysis
- Department of Chemistry
- Aarhus University
- DK-8000 Aarhus C, Denmark
| | - Niels Hammer
- Center for Catalysis
- Department of Chemistry
- Aarhus University
- DK-8000 Aarhus C, Denmark
| | - Line Næsborg
- Center for Catalysis
- Department of Chemistry
- Aarhus University
- DK-8000 Aarhus C, Denmark
| | - Karl Anker Jørgensen
- Center for Catalysis
- Department of Chemistry
- Aarhus University
- DK-8000 Aarhus C, Denmark
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865
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He Y, Zhang X, Fan X. One-pot cascade reactions of 1-arylpenta-3,4-dien-2-ones leading to 2-arylphenols and dibenzopyroanones. Chem Commun (Camb) 2014; 50:14968-70. [DOI: 10.1039/c4cc06204c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A one-pot tandem reaction of 1-arylpenta-3,4-dien-2-ones with activated ketones allowed for an efficient synthesis of 2-arylphenols. Moreover, this reaction was found to be also compatible and combinable with Pd-catalyzed C–H activation and carbonylation of the in situ formed 2-arylphenols to provide dibenzopyranones.
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Affiliation(s)
- Yan He
- School of Environment
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Henan Key Laboratory for Environmental Pollution Control
- Henan Normal University
| | - Xinying Zhang
- School of Environment
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Henan Key Laboratory for Environmental Pollution Control
- Henan Normal University
| | - Xuesen Fan
- School of Environment
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Henan Key Laboratory for Environmental Pollution Control
- Henan Normal University
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866
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Wan JP, Jing Y, Liu Y, Sheng S. Metal-free synthesis of cyano acrylates via cyanuric chloride-mediated three-component reactions involving a cascade consists of Knoevenagel condensation/cyano hydration/esterification. RSC Adv 2014. [DOI: 10.1039/c4ra13826k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The synthesis of cyano acrylates has been achieved via an organocatalytic domino Knoevenagel reaction, hydration and esterification under metal-free conditions without using any additional solvent.
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Affiliation(s)
- Jie-Ping Wan
- Key Laboratory of Functional Small Organic Molecules
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang 330022, P. R. China
| | - Yanfeng Jing
- Key Laboratory of Functional Small Organic Molecules
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang 330022, P. R. China
| | - Yunyun Liu
- Key Laboratory of Functional Small Organic Molecules
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang 330022, P. R. China
| | - Shouri Sheng
- Key Laboratory of Functional Small Organic Molecules
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang 330022, P. R. China
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867
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Xu L, Mou XQ, Chen ZM, Wang SH. Copper-catalyzed intermolecular azidocyanation of aryl alkenes. Chem Commun (Camb) 2014; 50:10676-9. [DOI: 10.1039/c4cc04640d] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A copper-catalyzed Markovnikov-type intermolecular azidocyanation of aryl alkenes has been developed for the first time.
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Affiliation(s)
- Li Xu
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000, P. R. China
| | - Xue-Qing Mou
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000, P. R. China
| | - Zhi-Min Chen
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000, P. R. China
| | - Shao-Hua Wang
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000, P. R. China
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
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868
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Li QZ, Gu J, Chen YC. Organocatalytic asymmetric [4 + 2] formal cycloadditions of cyclohexenylidenemalononitriles and enals to construct chiral bicyclo[2.2.2]octanes. RSC Adv 2014. [DOI: 10.1039/c4ra07709a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
A regio- and stereoselective [4 + 2] formal cycloaddition process of cyclohexenylidenemalononitriles and α,β-unsaturated aldehydes was developed via cascade iminium–enamine catalysis, generating chiral bridged bicyclo[2.2.2]octanes with high molecular complexity.
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Affiliation(s)
- Qing-Zhu Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education
- West China School of Pharmacy, and State Key Laboratory of Biotherapy
- West China Hospital
- Sichuan University
- Chengdu 610041, China
| | - Jing Gu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education
- West China School of Pharmacy, and State Key Laboratory of Biotherapy
- West China Hospital
- Sichuan University
- Chengdu 610041, China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education
- West China School of Pharmacy, and State Key Laboratory of Biotherapy
- West China Hospital
- Sichuan University
- Chengdu 610041, China
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869
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Bradshaw B, Luque-Corredera C, Bonjoch J. A gram-scale route to phlegmarine alkaloids: rapid total synthesis of (−)-cermizine B. Chem Commun (Camb) 2014; 50:7099-102. [DOI: 10.1039/c4cc01708k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The asymmetric total synthesis of the cis-phlegmarine alkaloid cermizine B was achieved rapidly and on a gram-scale by an uninterrupted eight-step sequence and a final reduction step.
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Affiliation(s)
- Ben Bradshaw
- Laboratori de Química Orgànica
- Facultat de Farmàcia
- IBUB
- Universitat de Barcelona
- 08028-Barcelona, Spain
| | - Carlos Luque-Corredera
- Laboratori de Química Orgànica
- Facultat de Farmàcia
- IBUB
- Universitat de Barcelona
- 08028-Barcelona, Spain
| | - Josep Bonjoch
- Laboratori de Química Orgànica
- Facultat de Farmàcia
- IBUB
- Universitat de Barcelona
- 08028-Barcelona, Spain
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870
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Seo UR, Chung YK. Poly(4-vinylimidazolium) iodides: a highly recyclable organocatalyst precursor for benzoin condensation reaction. RSC Adv 2014. [DOI: 10.1039/c4ra05073h] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The development of highly efficient, recyclable poly(4-vinylimidazolium) iodides (2) for the benzoin condensation reaction under mild reaction conditions is discussed: poly(4-vinylN-heterocyclic carbene)s (3) obtained from2showed a higher catalytic activity and could be successfully recovered and reused over seven times without loss of performance.
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Affiliation(s)
- Ue Ryung Seo
- Department of Chemistry
- College of Natural Sciences
- Seoul National University
- Seoul 151-747, Korea
| | - Young Keun Chung
- Department of Chemistry
- College of Natural Sciences
- Seoul National University
- Seoul 151-747, Korea
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871
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Tan Y, Chen YJ, Lin H, Luan HL, Sun XW, Yang XD, Lin GQ. A highly efficient asymmetric synthesis of quaternary stereocenter-containing indolizidine and quinolizidine alkaloids using aldehydes, nitroalkenes, and unactivated cyclic ketimines. Chem Commun (Camb) 2014; 50:15913-5. [DOI: 10.1039/c4cc07703b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A highly efficient approach to the construction of indolizidines and quinolizidines bearing a bridged quaternary stereocenter has been established in a one-pot fashion using aldehydes, nitroalkenes, and cyclic ketimines.
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Affiliation(s)
- Yu Tan
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
| | - Yong-Jian Chen
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
| | - Hua Lin
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
| | - Han-Lin Luan
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
| | - Xing-Wen Sun
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
| | - Xiao-Di Yang
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
| | - Guo-Qiang Lin
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
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872
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Liu Y, Zhang Q, Du Y, Yu A, Zhang K, Meng X. Convenient synthesis of substituted tetrahydrofuran via Lewis base catalyzed [3 + 2] domino reactions. RSC Adv 2014. [DOI: 10.1039/c4ra09249j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A DABCO catalyzed domino reaction between 3-oxo-4-(2-oxoindolin-3-ylidene) butanoates and allenoates furnished 2,3,5-substituted tetrahydrofuran furan derivatives bearing oxindole moiety and two exocyclic double bonds in high yield.
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Affiliation(s)
- Yufen Liu
- Department of Applied Chemistry, School of Chemistry & Chemical Engineering, Tianjin University of Technology
- Tianjin, P. R. China
| | - Qi Zhang
- Department of Applied Chemistry, School of Chemistry & Chemical Engineering, Tianjin University of Technology
- Tianjin, P. R. China
| | - Yanlong Du
- Department of Applied Chemistry, School of Chemistry & Chemical Engineering, Tianjin University of Technology
- Tianjin, P. R. China
| | - Aimin Yu
- Department of Applied Chemistry, School of Chemistry & Chemical Engineering, Tianjin University of Technology
- Tianjin, P. R. China
| | - Kui Zhang
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles, California 90095-1569, USA
| | - Xiangtai Meng
- Department of Applied Chemistry, School of Chemistry & Chemical Engineering, Tianjin University of Technology
- Tianjin, P. R. China
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873
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Lin S, Li L, Liang F, Liu Q. DABCO-catalyzed ring opening of activated cyclopropanes and recyclization leading to γ-lactams with an all-carbon quaternary center. Chem Commun (Camb) 2014; 50:10491-4. [DOI: 10.1039/c4cc03392b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A novel and efficient method for the construction of γ-lactams with an all-carbon quaternary center is developed via a DABCO-catalyzed reaction of EWG-activated cyclopropanecarboxamides and electron-deficient alkenes.
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Affiliation(s)
- Shaoxia Lin
- Department of Chemistry
- Northeast Normal University
- Changchun 130024, China
| | - Ling Li
- Department of Chemistry
- Northeast Normal University
- Changchun 130024, China
| | - Fushun Liang
- Department of Chemistry
- Northeast Normal University
- Changchun 130024, China
- Key Laboratory for UV-Emitting Materials and Technology of Ministry of Education
- Northeast Normal University
| | - Qun Liu
- Department of Chemistry
- Northeast Normal University
- Changchun 130024, China
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874
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Goudedranche S, Pierrot D, Constantieux T, Bonne D, Rodriguez J. A temporary-bridge strategy for enantioselective organocatalyzed synthesis of aza-seven-membered rings. Chem Commun (Camb) 2014; 50:15605-8. [DOI: 10.1039/c4cc07731h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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875
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Tan Y, Luan HL, Lin H, Sun XW, Yang XD, Dong HQ, Lin GQ. One-pot enantioselective construction of indoloquinolizidine derivatives bearing five contiguous stereocenters using aliphatic aldehydes, nitroethylenes, and tryptamine. Chem Commun (Camb) 2014; 50:10027-30. [DOI: 10.1039/c4cc01929f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An organocatalytic cascade reaction was established for the construction of indoloquinolizidine derivatives bearing five contiguous stereocenters from readily available starting materials.
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Affiliation(s)
- Yu Tan
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
| | - Han-Lin Luan
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
| | - Hua Lin
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
| | - Xing-Wen Sun
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
| | - Xiao-Di Yang
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
| | - Han-Qing Dong
- Shanghai Institute of Organic Chemistry
- Shanghai 200032, China
- Arvinas Inc
- New Haven, USA
| | - Guo-Qiang Lin
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
- Shanghai Institute of Organic Chemistry
- Shanghai 200032, China
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