1
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Zheng WH, Lv JF, He SM, Yu N, Zhou YQ, Yang YB, Liu LY, He KC, Wei Y, Jiang K. Relay Annulation of Ammonium Ylides with Oxindole-Derived α,β-Unsaturated Ketimines: Catalytic Construction of Spiro-polycyclic Oxindoles. Org Lett 2024; 26:5115-5119. [PMID: 38862412 DOI: 10.1021/acs.orglett.4c01442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
An ammonium ylide-based relay annulation was disclosed, which uses DABCO as the catalyst and oxindole-derived α,β-unsaturated ketimines and γ-bromo-crotonates as the starting materials. This method enables the rapid assembly of a series of structurally novel spiro-polycyclic oxindoles containing a bicyclo[4.1.0]heptane moiety through simultaneous generation of three new bonds and two rings in one step under mild reaction conditions.
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Affiliation(s)
- Wei-Hao Zheng
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Jing-Fang Lv
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Shi-Mei He
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Ning Yu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Yu-Qiang Zhou
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Yun-Bo Yang
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Lv-Yan Liu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Kui-Cheng He
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Ye Wei
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Kun Jiang
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
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2
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Khuntia R, Mahapatra SK, Roy L, Chandra Pan S. Structurally divergent enantioselective synthesis of benzofuran fused azocine derivatives and spiro-cyclopentanone benzofurans enabled by sequential catalysis. Chem Sci 2023; 14:10768-10776. [PMID: 37829006 PMCID: PMC10566461 DOI: 10.1039/d3sc03239f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 09/04/2023] [Indexed: 10/14/2023] Open
Abstract
An important objective in organic synthesis and medicinal chemistry is the capacity to access structurally varied and complex molecules rapidly and affordably from easily available starting materials. Herein, a protocol for the structurally divergent synthesis of benzofuran fused azocine derivatives and spiro-cyclopentanone benzofurans has been developed via chiral bifunctional urea catalyzed reaction between aurone-derived α,β-unsaturated imine and ynone followed by switchable divergent annulation reactions by Lewis base catalysts (DBU and PPh3) with concomitant epimerization. The skeletally diversified products were formed in high yields with high diastereo- and enantioselectivities. Computational analysis with DFT and accurate DLPNO-CCSD(T) has been employed to gain deeper insights into mechanistic intricacies and investigate the role of chiral and Lewis base catalysts in skeletal diversity.
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Affiliation(s)
- Rupkumar Khuntia
- Department of Chemistry, Indian Institute of Technology Guwahati Assam 781039 India https://www.iitg.ac.in/span/
| | - Sanat Kumar Mahapatra
- Institute of Chemical Technology Mumbai IOC Odisha Campus Bhubaneswar Bhubaneswar 751013 India
| | - Lisa Roy
- Institute of Chemical Technology Mumbai IOC Odisha Campus Bhubaneswar Bhubaneswar 751013 India
| | - Subhas Chandra Pan
- Department of Chemistry, Indian Institute of Technology Guwahati Assam 781039 India https://www.iitg.ac.in/span/
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3
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Li E, Tang K, Ren Z, Liao X, Liu Q, Huang Y, Chen J. Enantioselective S N 2 Alkylation of Homoenolates by N-Heterocyclic Carbene Catalysis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2303517. [PMID: 37541670 PMCID: PMC10582416 DOI: 10.1002/advs.202303517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/17/2023] [Indexed: 08/06/2023]
Abstract
The functionalization of the β-carbon of enals with electrophiles is a signature umpolung reactivity of N-heterocyclic carbene (NHC) derived homoenolates. However, only a limited number of electrophiles are shown to be compatible, with most of them being π-electrophiles. In this study, the successful enantioselective β-alkylation of homoenolates is reported using Csp3 electrophiles through an SN 2 strategy. The protocol shows a broad scope regarding alkyl electrophiles, delivering good yields, and excellent enantioselectivities (up to 99% ee). It enables the installation of drug-like structural motifs in either enals or alkylating agents, demonstrating its potential as a valuable tool for late-stage modification. Furthermore, a concise synthetic route is presented to chiral pyrroloindoline-type skeletons. Preliminary mechanistic studies support a direct SN 2 mechanism.
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Affiliation(s)
- En Li
- Pingshan Translational Medicine CenterShenzhen Bay LaboratoryShenzhen518118China
| | - Kai Tang
- Pingshan Translational Medicine CenterShenzhen Bay LaboratoryShenzhen518118China
| | - Zhuhui Ren
- Pingshan Translational Medicine CenterShenzhen Bay LaboratoryShenzhen518118China
| | - Xiaoyun Liao
- Pingshan Translational Medicine CenterShenzhen Bay LaboratoryShenzhen518118China
| | - Qianchen Liu
- Pingshan Translational Medicine CenterShenzhen Bay LaboratoryShenzhen518118China
- College of PharmacyShenzhen Technology UniversityShenzhen518118China
| | - Yong Huang
- Department of ChemistryThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SAR999077China
| | - Jiean Chen
- Pingshan Translational Medicine CenterShenzhen Bay LaboratoryShenzhen518118China
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4
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Debnath B, Sarkar T, Karjee P, Purkayastha SK, Guha AK, Punniyamurthy T. Palladium-Catalyzed Annulative Coupling of Spirovinylcyclopropyl Oxindoles with p-Quinone Methides. J Org Chem 2023. [PMID: 37437136 DOI: 10.1021/acs.joc.3c00173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
Pd-catalyzed annulative coupling of spirovinylcyclopropyl oxindoles with p-quinone methides has been accomplished via cascade carbon-carbon bond formation to afford bis-spirooxindole scaffolds. The mild reaction conditions, diastereoselectivity, functional group diversity, post-synthetic transformations, and mechanistic studies using DFT calculations are the important practical features.
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Affiliation(s)
- Bijoy Debnath
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Tanumay Sarkar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Pallab Karjee
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | | | - Ankur K Guha
- Advanced Computational Chemistry Centre, Cotton University, Guwahati 781001, India
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5
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Li S, Wen YH, Song J, Gong LZ. Asymmetric redox benzylation of enals enabled by NHC/Ru cooperative catalysis. SCIENCE ADVANCES 2023; 9:eadf5606. [PMID: 37075106 PMCID: PMC10115414 DOI: 10.1126/sciadv.adf5606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The development of general methods for asymmetric benzylation of prochiral carbon nucleophiles remains a challenge in organic synthesis. The merging of ruthenium catalysis and N-heterocyclic carbene (NHC) catalysis for asymmetric redox benzylation of enals has been achieved, which opens up strategic opportunities for the asymmetric benzylation reactions. A wide range of 3,3'-disubstituted oxindoles with a stereogenic quaternary carbon center widely existing in natural products and biologically interesting molecules is successfully obtained with excellent enantioselectivities [up to 99% enantiomeric excess (ee)]. The generality of this catalytic strategy was further highlighted by its successful application in the late-stage functionalization of oxindole skeletons. Furthermore, the linear correlation between ee values of NHC precatalyst and the product elucidated the independent catalytic cycle of either the NHC catalyst or the ruthenium complex.
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Affiliation(s)
- Shuai Li
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Yu-Hua Wen
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Jin Song
- Institutes of Physical Science and Information Technology, Key Laboratory of Environment-Friendly Polymeric Materials of Anhui Province, Anhui University, Hefei 230601, China
- Corresponding author. (L.-Z. G.); (J. S.)
| | - Liu-Zhu Gong
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Hefei 230026, China
- Corresponding author. (L.-Z. G.); (J. S.)
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6
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Li YL, Yu N, He KC, Zhou YQ, Zheng WH, Jiang K, Wei Y. Skeletal Transformation of Oxindoles into Quinolinones Enabled by Synergistic Copper/Iminium Catalysis. J Org Chem 2023; 88:4863-4874. [PMID: 36946256 DOI: 10.1021/acs.joc.3c00103] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
We describe a synergistic Cu/secondary amine catalysis for skeletal transformation of an oxindole core into a quinolinone skeleton, which generates several structurally new pyridine-fused quinolinones. The synergistic reactions allow expansion of a five-membered lactam ring by radical cation-triggered C-C bond cleavage and enable a further intramolecular cyclization with the aim to construct totally distinct core skeletons.
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Affiliation(s)
- Yu-Lin Li
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Ning Yu
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Kui-Cheng He
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yu-Qiang Zhou
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Wei-Hao Zheng
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Kun Jiang
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Ye Wei
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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7
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Liu B, Duan XY, Li J, Wu Y, Li Y, Qi J. N-Heterocyclic Carbene-Catalyzed [3 + 2] Annulation of 3,3'-Bisoxindoles with α-Bromoenals: Enantioselective Construction of Contiguous Quaternary Stereocenters. Org Lett 2022; 24:5929-5934. [PMID: 35947030 DOI: 10.1021/acs.orglett.2c02180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An NHC-catalyzed enantio- and diastereoselective [3 + 2] annulation of α-bromoenals with bisoxindoles is developed, affording efficient access to various spirocyclic bisoxindole alkaloids. This protocol tolerates a broad substrates scope, with various spirocyclic bisoxindoles obtained in generally excellent enantioselectivities. More importantly, two contiguous sterically congested all-carbon quaternary stereocenters are successfully created during this process.
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Affiliation(s)
- Binghao Liu
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Xiao-Yong Duan
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China.,Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People's Republic of China
| | - Jiahan Li
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Yatong Wu
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Yanting Li
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Jing Qi
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China.,Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People's Republic of China
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8
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Biswas S, Balha M, Das S, Pan SC. Organocatalytic Asymmetric Reaction between α‐Cyano Enones and Dioxindoles: Synthesis of Dihydrofuran‐Spirooxindoles. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Subhankar Biswas
- Indian Institute of Technology Guwahati Chemistry IITG Road 781039 Guwahati INDIA
| | - Megha Balha
- Indian Institute of Technology Guwahati Chemistry IITG Road 781039 Guwahati INDIA
| | - Suman Das
- Indian Institute of Technology Guwahati Chemistry IITG Road 781039 Guwahati INDIA
| | - Subhas Chandra Pan
- Indian Institute of Technology Guwahati Chemistry Department of Chemistry, Indian Institute of Technology Guwahati 781039 Guwahati INDIA
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9
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Pramanik S, Jagadeesh C, Chatterjee A, Debnath SC, Saha J. Access to densely functionalized spirocyclopentenonyl oxindole frameworks via aza- and carbo-Piancatelli rearrangement. Org Biomol Chem 2022; 20:5249-5253. [PMID: 35730444 DOI: 10.1039/d2ob00883a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new strategy for access to spirocyclopentenonyl oxindole frameworks is disclosed. Suitably anchored furfuryl alcohol at C3 of an oxindole was used for the aza-Piancatelli rearrangement, which furnished spirocyclic aminocyclopentenone frameworks with catalytic phosphomolybdic acid. The scope of the transformation was extended to the carbo-Piancatelli rearrangement with various indole derivatives.
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Affiliation(s)
- Sourav Pramanik
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India. .,Department of Chemistry, University of Kalyani, Nadia, W.B-741235, India
| | - Chenna Jagadeesh
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India.
| | - Ayan Chatterjee
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India.
| | | | - Jaideep Saha
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India.
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10
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Fan T, Song J, Gong L. Asymmetric Redox Allylic Alkylation to Access 3,3′‐Disubstituted Oxindoles Enabled by Ni/NHC Cooperative Catalysis. Angew Chem Int Ed Engl 2022; 61:e202201678. [DOI: 10.1002/anie.202201678] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Indexed: 12/15/2022]
Affiliation(s)
- Tao Fan
- Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Institutes of Physical Science and Information Technology Anhui University Hefei 230601 China
| | - Liu‐Zhu Gong
- Department of Chemistry University of Science and Technology of China Hefei 230026 China
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences Hefei 230026 China
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11
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Solanke PR, Cinsani R, Nayani K, Mainkar PS, Chandrasekhar S. Quaternary carbon construction through Piancatelli rearrangement: easy access to spirocyclopentenones. Chem Commun (Camb) 2022; 58:5530-5533. [PMID: 35420603 DOI: 10.1039/d2cc00050d] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A new and efficient approach to a series of novel multifunctionalized spirocyclopentenone scaffolds through Piancatelli rearrangement was developed under metal-free conditions. This method has been successfully applied to O-, N- and C-nucleophiles with excellent yields.
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Affiliation(s)
- Pooja R Solanke
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Radhika Cinsani
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kiranmai Nayani
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Prathama S Mainkar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Srivari Chandrasekhar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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12
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Fan T, Song J, Gong L. Asymmetric Redox Allylic Alkylation to Access 3,3′‐Disubstituted Oxindoles Enabled by Ni/NHC Cooperative Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tao Fan
- Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Institutes of Physical Science and Information Technology Anhui University Hefei 230601 China
| | - Liu‐Zhu Gong
- Department of Chemistry University of Science and Technology of China Hefei 230026 China
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences Hefei 230026 China
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13
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Xue Y, Guo Z, Chen X, Li J, Zou D, Wu Y, Wu Y. Copper-promoted difunctionalization of unactivated alkenes with silanes. Org Biomol Chem 2022; 20:989-994. [PMID: 35018960 DOI: 10.1039/d1ob02318g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
An efficient copper-catalyzed cascade difunctionalization of N-allyl anilines toward the synthesis of silylated indolines using commercially available silanes has been reported. This strategy provides a new avenue for the synthesis of a diverse array of indolines in reasonable yields. Preliminary mechanistic investigations indicate that the reaction probably proceeds via a radical pathway with unactivated alkenes as radical acceptors and simple silanes as radical precursors. This protocol is distinguished by its atom economy, broad substrate scope and readily available starting materials.
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Affiliation(s)
- Yingying Xue
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450052, People's Republic of China.
| | - Zhuangzhuang Guo
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450052, People's Republic of China.
| | - Xiaoyu Chen
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450052, People's Republic of China.
| | - Jingya Li
- TetranovBiopharm, LLC., Zhengzhou, 450052, People's Republic of China
| | - Dapeng Zou
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450052, People's Republic of China.
| | - Yangjie Wu
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450052, People's Republic of China.
| | - Yusheng Wu
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450052, People's Republic of China. .,Tetranov International, Inc., 100 Jersey Avenue, Suite A340, New Brunswick, NJ 08901, USA.
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14
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Zhang J, Liang Z, Zhang S, Chen L, Wang X, Wang Y, Feng J, Lu T, Du D, Gao J. An N-heterocyclic carbene-catalyzed enantioselective [3 + 2] annulation of enals with propargylic imines: access to γ,γ-disubstituted pyrrolidin-2-ones bearing quaternary stereogenic centers. Org Chem Front 2022. [DOI: 10.1039/d2qo00350c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An N-heterocyclic carbene-catalyzed enantioselective [3 + 2] annulation of enals with propargylic imines for the construction of γ,γ-disubstituted pyrrolidin-2-ones was developed.
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Affiliation(s)
- Jianming Zhang
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
| | - Zheng Liang
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
| | - Simiao Zhang
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
| | - Lei Chen
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
| | - Xiaoxue Wang
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
| | - Yuchan Wang
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
| | - Jie Feng
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
| | - Tao Lu
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
| | - Ding Du
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
| | - Jian Gao
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
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15
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Pan Y, Ren W, Zhang Z, Luo F, Hou X, Li X, Yang YF, Wang Y. Tandem 1,6-addition/cyclopropanation/rearrangement reaction of vinylogous para-quinone methides with 3-chlorooxindoles: construction of vicinal quaternary carbon centers. Org Chem Front 2022. [DOI: 10.1039/d2qo00471b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel tandem 1,6-addition/cyclopropanation/rearrangement reaction of vinylogous para-quinone methides with 3-chlorooxindoles has been developed, providing dispirooxindole–cyclopentane–cyclohexadienones with vicinal quaternary carbon centers.
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Affiliation(s)
- Yuan Pan
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Weiwu Ren
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology (QNLM), Qingdao 266237, China
| | - Zhanhao Zhang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Fengbiao Luo
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Xiaohan Hou
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Xiaoyang Li
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Yun-Fang Yang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Yang Wang
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology (QNLM), Qingdao 266237, China
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16
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Liu B, Qi J, Wu Y, Li JH, Li Y, Duan XY. The N-heterocyclic carbene-catalyzed [3 + 2] annulation of isoindigos with enals: the enantioselective construction of three contiguous stereogenic centers. Org Chem Front 2022. [DOI: 10.1039/d1qo01507a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
An NHC-catalyzed enantioselective [3 + 2] annulation of enals and isoindigo is introduced as an efficient strategy for the construction of dimeric spirocyclic bisindoline alkaloid derivatives with moderate yields and good enantioselectivities.
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Affiliation(s)
- Binghao Liu
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Jing Qi
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People's Republic of China
| | - Yatong Wu
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Jia-Hui Li
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Yanting Li
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Xiao-Yong Duan
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People's Republic of China
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17
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Lupidi G, Palmieri A, Petrini M. Enantioselective Catalyzed Synthesis of Amino Derivatives Using Electrophilic Open‐Chain
N
‐Activated Ketimines. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100292] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Gabriele Lupidi
- School of Science and Technology, Chemistry Division Università di Camerino via S.Agostino, 1 I-62032 Camerino Italy
| | - Alessandro Palmieri
- School of Science and Technology, Chemistry Division Università di Camerino via S.Agostino, 1 I-62032 Camerino Italy
| | - Marino Petrini
- School of Science and Technology, Chemistry Division Università di Camerino via S.Agostino, 1 I-62032 Camerino Italy
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18
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Ai Y, Li D, Li G, Li H, He X, Fu X, Wang Y, Zhan G, Han B. Asymmetric Synthesis of Spirocyclopentane Oxindoles
via
[2+3] Annulation with 2‐(2‐Oxoindolin‐3‐yl)malononitriles as 1,2‐Carbon Bisnucleophiles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100235] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yue‐Yan Ai
- State Key Laboratory of Southwestern Chinese Medicine Resources, Hospital of Chengdu University of Traditional Chinese Medicine, School of Pharmacy Chengdu University of Traditional Chinese Medicine Chengdu 611137 People's Republic of China
- Ministry of Education Key Laboratory of Standardization of Chinese Medicine Chengdu University of Traditional Chinese Medicine Chengdu 611137 People's Republic of China
| | - Dong‐Ai Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Hospital of Chengdu University of Traditional Chinese Medicine, School of Pharmacy Chengdu University of Traditional Chinese Medicine Chengdu 611137 People's Republic of China
| | - Guo Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Hospital of Chengdu University of Traditional Chinese Medicine, School of Pharmacy Chengdu University of Traditional Chinese Medicine Chengdu 611137 People's Republic of China
| | - He‐Ping Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Hospital of Chengdu University of Traditional Chinese Medicine, School of Pharmacy Chengdu University of Traditional Chinese Medicine Chengdu 611137 People's Republic of China
| | - Xiang‐Hong He
- State Key Laboratory of Southwestern Chinese Medicine Resources, Hospital of Chengdu University of Traditional Chinese Medicine, School of Pharmacy Chengdu University of Traditional Chinese Medicine Chengdu 611137 People's Republic of China
| | - Xue‐Ju Fu
- State Key Laboratory of Southwestern Chinese Medicine Resources, Hospital of Chengdu University of Traditional Chinese Medicine, School of Pharmacy Chengdu University of Traditional Chinese Medicine Chengdu 611137 People's Republic of China
| | - Yu‐Ting Wang
- State Key Laboratory of Southwestern Chinese Medicine Resources, Hospital of Chengdu University of Traditional Chinese Medicine, School of Pharmacy Chengdu University of Traditional Chinese Medicine Chengdu 611137 People's Republic of China
| | - Gu Zhan
- State Key Laboratory of Southwestern Chinese Medicine Resources, Hospital of Chengdu University of Traditional Chinese Medicine, School of Pharmacy Chengdu University of Traditional Chinese Medicine Chengdu 611137 People's Republic of China
- Ministry of Education Key Laboratory of Standardization of Chinese Medicine Chengdu University of Traditional Chinese Medicine Chengdu 611137 People's Republic of China
| | - Bo Han
- State Key Laboratory of Southwestern Chinese Medicine Resources, Hospital of Chengdu University of Traditional Chinese Medicine, School of Pharmacy Chengdu University of Traditional Chinese Medicine Chengdu 611137 People's Republic of China
- Ministry of Education Key Laboratory of Standardization of Chinese Medicine Chengdu University of Traditional Chinese Medicine Chengdu 611137 People's Republic of China
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19
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Li H, He Z. Chiral phosphine-catalyzed asymmetric [4 + 1] annulation of polar dienes with allylic derivatives: Enantioselective synthesis of substituted cyclopentenes. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152863] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Abstract
This review summaries recent synthetic developments towards spirocyclic oxindoles and applications as valuable medicinal and synthetic targets.
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Affiliation(s)
- Alexander J. Boddy
- Department of Chemistry
- Imperial College London
- Molecular Sciences Research Hub
- London W12 0BZ
- UK
| | - James A. Bull
- Department of Chemistry
- Imperial College London
- Molecular Sciences Research Hub
- London W12 0BZ
- UK
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21
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Chen GS, Fang YB, Ren Z, Tian X, Liu YL. Reaction condition-dependent divergent synthesis of spirooxindoles and bisoxindoles. Org Chem Front 2021. [DOI: 10.1039/d1qo00575h] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
DABCO-catalyzed divergent transformations of isatin-derived MBH carbonates leading to either spirocyclopentene oxindoles, spirocyclopentadiene 2-oxindoles or bisoxindoles are described.
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Affiliation(s)
- Guo-Shu Chen
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- China
| | - Yu-Bo Fang
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- China
| | - Zhi Ren
- College of Pharmacy
- Shenzhen Technology University
- Shenzhen
- China
| | - Xu Tian
- School of Pharmacy
- Guangzhou Medical University
- Guangzhou
- China
| | - Yun-Lin Liu
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- China
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22
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Zhang Z, Wen Y, Song J, Gong L. Kinetic Resolution of Aziridines Enabled by N‐Heterocyclic Carbene/Copper Cooperative Catalysis: Carbene Dose‐Controlled Chemo‐Switchability. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202013679] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Zi‐Jing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS University of Science and Technology of China Hefei 230026 China
| | - Yu‐Hua Wen
- Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS University of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS University of Science and Technology of China Hefei 230026 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS University of Science and Technology of China Hefei 230026 China
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23
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Zhang ZJ, Wen YH, Song J, Gong LZ. Kinetic Resolution of Aziridines Enabled by N-Heterocyclic Carbene/Copper Cooperative Catalysis: Carbene Dose-Controlled Chemo-Switchability. Angew Chem Int Ed Engl 2020; 60:3268-3276. [PMID: 33103824 DOI: 10.1002/anie.202013679] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 10/24/2020] [Indexed: 02/06/2023]
Abstract
Catalytic kinetic resolution (KR) and dynamic kinetic asymmetric transformation (DyKAT) are alternative and complementary avenues to access chiral stereoisomers of both starting materials and reaction products. The development of highly efficient chiral catalytic systems for kinetically controlled processes has therefore been one of the linchpins in asymmetric synthesis. N-heterocyclic carbene (NHC)/copper cooperative catalysis has enabled highly efficient KR and DyKAT of racemic N-tosylaziridines by [3+3] annulation with isatin-derived enals, leading to highly enantioenriched N-tosylaziridine derivatives (up to >99 % ee) and a large library of spirooxindole derivatives with high structural diversity and stereoselectivity (up to >95:5 d.r., >99 % ee). Mechanistic studies suggest that the NHC can bind reversibly to the copper catalyst without compromising its catalytic activity and regulate the catalytic activity of the copper complex to switch the chemoselection between KR and DyKAT.
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Affiliation(s)
- Zi-Jing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, 230026, China
| | - Yu-Hua Wen
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, 230026, China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, 230026, China
| | - Liu-Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, 230026, China
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24
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Wan Q, Chen L, Li S, Kang Q, Yuan Y, Du Y. Enantioselective Synthesis of Multisubstituted Spirocyclopentane Oxindoles Enabled by Pd/Chiral Rh(III) Complex Synergistic Catalysis. Org Lett 2020; 22:9539-9544. [PMID: 33263254 DOI: 10.1021/acs.orglett.0c03588] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Qian Wan
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China
| | - Liang Chen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, P. R. China
| | - Shiwu Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, P. R. China
| | - Qiang Kang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, P. R. China
| | - Yaofeng Yuan
- College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China
| | - Yu Du
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, P. R. China
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25
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Chu H, Cheng J, Yang J, Guo Y, Zhang J. Asymmetric Dearomatization of Indole by Palladium/PC‐Phos‐Catalyzed Dynamic Kinetic Transformation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010164] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Haoke Chu
- Department of Chemistry Fudan University 2005 Songhu Road Shanghai 200438 China
| | - Jie Cheng
- Stake Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai China
| | - Junfeng Yang
- Department of Chemistry Fudan University 2005 Songhu Road Shanghai 200438 China
| | - Yin‐Long Guo
- Stake Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai China
| | - Junliang Zhang
- Department of Chemistry Fudan University 2005 Songhu Road Shanghai 200438 China
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26
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Chu H, Cheng J, Yang J, Guo YL, Zhang J. Asymmetric Dearomatization of Indole by Palladium/PC-Phos-Catalyzed Dynamic Kinetic Transformation. Angew Chem Int Ed Engl 2020; 59:21991-21996. [PMID: 32851748 DOI: 10.1002/anie.202010164] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Indexed: 01/08/2023]
Abstract
A palladium-catalyzed intermolecular dynamic kinetic asymmetric dearomatization of 3-arylindoles with internal alkynes was developed with the use of achiral Xantphos and chiral sulfinamide phosphine ligand (PC-Phos) as the co-ligands. This method could deliver various spiro[indene-1,3'-indole] compounds in good yields (up to 95 % yield) with up to 98 % ee. The salient features of the transformation include the use of readily available substrates, ease of scale-up and the versatile functionalization of the products. The mechanistic experiments gave some insights on active intermediates.
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Affiliation(s)
- Haoke Chu
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, China
| | - Jie Cheng
- Stake Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
| | - Junfeng Yang
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, China
| | - Yin-Long Guo
- Stake Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
| | - Junliang Zhang
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, China
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27
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Abstract
An important strategy for the efficient generation of diversity in molecular structures is the utilization of common starting materials in chemodivergent transformations. The most studied solutions for switching the chemoselectivity rely on the catalyst, ligand, additive, solvent, temperature, time, pressure, pH and even small modifications in the substrate. In this review article several processes have been selected such as inter- and intramolecular cyclizations, including carba-, oxa-, thia- and oxazacyclizations promoted mainly by Brønsted or Lewis acids, transition metals and organocatalysts, as well as radical reactions. Catalyst-controlled intra- and intermolecular cyclizations are mainly described to give five- and six-membered rings. Cycloaddition reactions involving (2+2), (3+2), (3+3), (4+1), (4+2), (5+2), (6+2) and (7+2) processes are useful reactions for the synthesis of cyclic systems using organocatalysts, metal catalysts and Lewis acid-controlled processes. Addition reactions mainly of carba- and heteronucleophiles to unsaturated conjugated substrates can give different adducts via metal catalyst-, Lewis acid- and solvent-dependent processes. Carbonylation reactions of amines and phenols are carried out via ligand-controlled transition metal-catalyzed multicomponent processes. Ring-opening reactions starting mainly from cyclopropanols, cyclopropenols and epoxides or aziridines are applied to the synthesis of acyclic versus cyclic products under catalyst-control mainly by Lewis acids. Chemodivergent reduction reactions are performed using dissolving metals, sodium borohydride or hydrogen transfer conditions under solvent control. Oxidation reactions include molecular oxygen under solvent control or using different dioxiranes, as well as chemodivergent palladium catalyzed cross-coupling reactions using boronic acids are applied to aromatic and allenic compounds. Other chemodivergent reactions such as alkylations and allylations under transition metal catalysis, dimerization of acetylenes, bromination of benzylic substrates, and A3-couplings are performed via catalyst- or reaction condition-dependent processes.
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Affiliation(s)
- Irina P Beletskaya
- Chemistry Department, M. V. Lomonosov Moscow University, Leminskie Gory 1, 119992 Moscow, Russia
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28
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Wang M, Tseng P, Chi W, Suresh S, Edukondalu A, Chen Y, Lin W. Diversity‐Oriented Synthesis of Spirocyclohexene Indane‐1,3‐diones and Coumarin‐Fused Cyclopentanes via an Organobase‐Controlled Cascade Reaction. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000597] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Min Wang
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Ping‐Yao Tseng
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Woei‐Jye Chi
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Sundaram Suresh
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Athukuri Edukondalu
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Yi‐Ru Chen
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Wenwei Lin
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
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29
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Luo W, Sun Z, Fernando EHN, Nesterov VN, Cundari TR, Wang H. Formal oxo- and aza-[3 + 2] reactions of α-enaminones and quinones: a double divergent process and the roles of chiral phosphoric acid and molecular sieves. Chem Sci 2020; 11:9386-9394. [PMID: 34094204 PMCID: PMC8162164 DOI: 10.1039/d0sc02078h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 07/07/2020] [Indexed: 11/21/2022] Open
Abstract
A double divergent process has been developed for the reaction of α-enaminones with quinones through facile manipulation of catalyst and additive, leading to structurally completely different products. The two divergent processes, which involve formal aza- and oxo-[3 + 2] cycloaddition reactions, are mediated by chiral phosphoric acid and molecular sieves, respectively. While inclusion of phosphoric acid in the reaction switched the reaction pathway to favor the efficient formation of a wide range of N-substituted indoles, addition of 4 Å molecular sieves to the reaction switched the reaction pathway again, leading to enantioselective synthesis of 2,3-dihydrobenzofurans in excellent yields and enantioselectivities under mild conditions. Studies in this work suggest that the chiral phosphoric acid acts to lower the transition state energy and promote the formation of amide intermediate for the formal aza-[3 + 2] cycloaddition and the molecular sieves serve to facilitate proton transfer for oxo-[3 + 2] cycloaddition. The reactivity of α-enaminones is also disclosed in this work.
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Affiliation(s)
- Weiwei Luo
- Department of Chemistry, University of North Texas Denton TX 76203 USA
| | - Zhicheng Sun
- Department of Chemistry, University of North Texas Denton TX 76203 USA
| | | | | | - Thomas R Cundari
- Department of Chemistry, University of North Texas Denton TX 76203 USA
| | - Hong Wang
- Department of Chemistry, University of North Texas Denton TX 76203 USA
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30
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Sansinenea E, Martínez EF, Ortiz A. Organocatalytic Synthesis of Chiral Spirooxindoles with Quaternary Stereogenic Centers. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000470] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Estibaliz Sansinenea
- Facultad de Ciencias Químicas Benemérita Universidad Autónoma de Puebla Puebla México
| | | | - Aurelio Ortiz
- Facultad de Ciencias Químicas Benemérita Universidad Autónoma de Puebla Puebla México
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31
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Ferrocenylated Chalcogen (Se and Te)-containing N-heterocyclic carbenes: Selenones, silver and palladium complexes. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119531] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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32
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Singh B, Bankar SK, Kumar K, Ramasastry SSV. Palladium-catalysed 5- endo-trig allylic (hetero)arylation. Chem Sci 2020; 11:4948-4953. [PMID: 34122951 PMCID: PMC8159216 DOI: 10.1039/d0sc01932a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 08/14/2020] [Accepted: 04/18/2020] [Indexed: 12/16/2022] Open
Abstract
A palladium-catalysed intramolecular allylic (hetero)arylation strategy for the synthesis of fused cyclopentenes incorporated with all-carbon quaternary and spiro centres is described. The method is straightforward, shows broad scope, proceeds in synthetically useful yields, and provides a rare means to construct complex cyclopentanoids. The reaction is believed to involve a kinetically unfavourable 5-endo-trig carbocyclisation of the tethered (π-allyl)palladium system. Further, this method was successfully applied as the key step in the total synthesis of diterpene natural products taiwaniaquinone H and dichroanone.
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Affiliation(s)
- Bara Singh
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Sector 81, Manauli PO, S. A. S. Nagar Punjab 140306 India
| | - Siddheshwar K Bankar
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Sector 81, Manauli PO, S. A. S. Nagar Punjab 140306 India
| | - Ketan Kumar
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Sector 81, Manauli PO, S. A. S. Nagar Punjab 140306 India
| | - S S V Ramasastry
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Sector 81, Manauli PO, S. A. S. Nagar Punjab 140306 India
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33
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Vagh SS, Karanam P, Liao C, Lin T, Liou Y, Edukondalu A, Chen Y, Lin W. Enantioselective Construction of Spirooxindole‐Fused Cyclopenta[
c
]chromen‐4‐ones Bearing Five Contiguous Stereocenters via a Stepwise (3+2) Cycloaddition. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901655] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sandip Sambhaji Vagh
- Department of ChemistryNational Taiwan Normal University 88, Sec. 4, Tingchow Road Taipei 11677 Taiwan, R.O.C
| | - Praneeth Karanam
- Department of ChemistryNational Taiwan Normal University 88, Sec. 4, Tingchow Road Taipei 11677 Taiwan, R.O.C
| | - Cheng‐Chieh Liao
- Department of ChemistryNational Taiwan Normal University 88, Sec. 4, Tingchow Road Taipei 11677 Taiwan, R.O.C
| | - Ting‐Han Lin
- Department of ChemistryNational Taiwan Normal University 88, Sec. 4, Tingchow Road Taipei 11677 Taiwan, R.O.C
| | - Yan‐Cheng Liou
- Department of ChemistryNational Taiwan Normal University 88, Sec. 4, Tingchow Road Taipei 11677 Taiwan, R.O.C
| | - Athukuri Edukondalu
- Department of ChemistryNational Taiwan Normal University 88, Sec. 4, Tingchow Road Taipei 11677 Taiwan, R.O.C
| | - Yi‐Ru Chen
- Department of ChemistryNational Taiwan Normal University 88, Sec. 4, Tingchow Road Taipei 11677 Taiwan, R.O.C
| | - Wenwei Lin
- Department of ChemistryNational Taiwan Normal University 88, Sec. 4, Tingchow Road Taipei 11677 Taiwan, R.O.C
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34
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Visible-light-induced aerobic epoxidation in cyclic ether: Synthesis of spiroepoxyoxindole derivatives. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151578] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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35
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Cao ZH, Wang YH, Kalita SJ, Schneider U, Huang YY. Phosphine-Catalyzed [4+1] Cycloadditions of Allenes with Methyl Ketimines, Enamines, and a Primary Amine. Angew Chem Int Ed Engl 2020; 59:1884-1890. [PMID: 31747102 DOI: 10.1002/anie.201912263] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/06/2019] [Indexed: 12/12/2022]
Abstract
Unprecedented phosphine-catalyzed [4+1] cycloadditions of allenyl imides have been discovered using various N-based substrates including methyl ketimines, enamines, and a primary amine. These transformations provide a one-pot access to cyclopentenoyl enamines and imines, or (chiral) γ-lactams through two geminal C-C bond or two C-N bond formations, respectively. Several P-based key intermediates including a 1,4-(bis)electrophilic α,β-unsaturated ketenyl phosphonium species have been detected by 31 P NMR and HRMS analyses, which shed light on the postulated catalytic cycle. The synthetic utility of this new chemistry has been demonstrated through a gram-scaling up of the catalytic reaction as well as regioselective hydrogenation and double condensation to form cyclopentanoyl enamines and fused pyrazole building blocks, respectively.
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Affiliation(s)
- Ze-Hun Cao
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, China
| | - Yu-Hao Wang
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, China
| | - Subarna Jyoti Kalita
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, China
| | - Uwe Schneider
- EaStCHEM School of Chemistry, The University of Edinburgh, The King's Buildings, David Brewster Road, Edinburgh, EH9 3FJ, UK
| | - Yi-Yong Huang
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, China
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36
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Cao Z, Wang Y, Kalita SJ, Schneider U, Huang Y. Phosphine‐Catalyzed [4+1] Cycloadditions of Allenes with Methyl Ketimines, Enamines, and a Primary Amine. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201912263] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ze‐Hun Cao
- Department of ChemistrySchool of Chemistry, Chemical Engineering and Life ScienceWuhan University of Technology Wuhan 430070 China
| | - Yu‐Hao Wang
- Department of ChemistrySchool of Chemistry, Chemical Engineering and Life ScienceWuhan University of Technology Wuhan 430070 China
| | - Subarna Jyoti Kalita
- Department of ChemistrySchool of Chemistry, Chemical Engineering and Life ScienceWuhan University of Technology Wuhan 430070 China
| | - Uwe Schneider
- EaStCHEM School of ChemistryThe University of EdinburghThe King's Buildings David Brewster Road Edinburgh EH9 3FJ UK
| | - Yi‐Yong Huang
- Department of ChemistrySchool of Chemistry, Chemical Engineering and Life ScienceWuhan University of Technology Wuhan 430070 China
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37
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Shi X, Dong M, Duan X, Cao T, Qi J. N
‐Heterocyclic Carbene Catalyzed [3+2] Cycloaddition of Enals with
β,γ
‐Unsaturated
α
‐Ketimino Esters for the Synthesis of Multisubstituted Cyclopentanone. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901144] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xiao‐Qian Shi
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental ScienceHebei University
| | - Meng‐Die Dong
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental ScienceHebei University
| | - Xiao‐Yong Duan
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental ScienceHebei University
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of EducationHebei University
| | - Teng‐Liang Cao
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental ScienceHebei University
| | - Jing Qi
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental ScienceHebei University
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of EducationHebei University
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38
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Wang C, Li Z, Zhang J, Hui XP. Asymmetric N-alkylation of indoles with isatins catalyzed by N-heterocyclic carbene: efficient synthesis of functionalized cyclic N,O-aminal indole derivatives. Org Chem Front 2020. [DOI: 10.1039/d0qo00237b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Enantioselective N-alkylation of indole-2-formaldehydes with isatins catalyzed by NHCs is described for efficient synthesis of functionalized cyclic N,O-aminal indole derivatives.
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Affiliation(s)
- Chengyuan Wang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Zhuopeng Li
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Jiong Zhang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xin-Ping Hui
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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39
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Sohail M, Tanaka F. Control of Chemical Reactions by Using Molecules that Buffer Non‐aqueous Solutions. Chemistry 2019; 26:222-229. [DOI: 10.1002/chem.201903552] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 10/17/2019] [Indexed: 01/23/2023]
Affiliation(s)
- Muhammad Sohail
- Chemistry and Chemical Bioengineering Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna Okinawa 904-0495 Japan
| | - Fujie Tanaka
- Chemistry and Chemical Bioengineering Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna Okinawa 904-0495 Japan
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40
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Liu D, Hu Z, Zhang Y, Gong M, Fu Z, Huang W. Access to Enantioenriched Spiro-ϵ-Lactam Oxindoles by an N-Heterocyclic Carbene-Catalyzed [4+3] Annulation of Flexible Oxotryptamines with Enals. Chemistry 2019; 25:11223-11227. [PMID: 31298766 DOI: 10.1002/chem.201903144] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Indexed: 01/06/2023]
Abstract
Oxotryptamines were firstly used as flexible four-atom synthons in an NHC-catalyzed formal [4+3] annulation, providing a novel enantioselective method to access structurally diverse spiro-ϵ-lactam oxindoles with excellent enantioselectivities. This metal-free reaction features a broad substrate scope, excellent functional-group tolerance and proceeds under mild reaction conditions. Importantly, enantiopure privileged hexahydropyrroloindoles could be easily constructed by a one-pot process from the resulting spiro-ϵ-lactam oxindoles.
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Affiliation(s)
- Dehai Liu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Zhouli Hu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Yuxia Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Minghua Gong
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Zhenqian Fu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.,Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, P. R. China
| | - Wei Huang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.,Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, P. R. China
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41
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Zhang Z, Zhang L, Geng R, Song J, Chen X, Gong L. N‐Heterocyclic Carbene/Copper Cooperative Catalysis for the Asymmetric Synthesis of Spirooxindoles. Angew Chem Int Ed Engl 2019; 58:12190-12194. [DOI: 10.1002/anie.201907188] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Indexed: 01/05/2023]
Affiliation(s)
- Zi‐Jing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Ling Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Rui‐Long Geng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Xiao‐Hua Chen
- Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Center for Excellence in Molecular Synthesis of CAS Hefei, 230026 China
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42
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Li D, Wang Y, Jia Z, Ou Z, Dong Y, Lv C, Fu G, Liang D. Cu-Mediated Synthesis of Indolines and Dihydroisoquinolinones through Arylperfluoroalkylation of Unactivated Alkenes. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900680] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Dandan Li
- School of Chemistry and Chemical Engineering; Xuchang University; No. 88, Bayi Road, Xuchang, Henan 461000 P. R. China
| | - Yan Wang
- Department of Chemistry; Kunming University; 650214 Kunming P. R. China
| | - Zhenzhen Jia
- School of Chemistry and Chemical Engineering; Xuchang University; No. 88, Bayi Road, Xuchang, Henan 461000 P. R. China
| | - Zhaocheng Ou
- School of Chemistry and Chemical Engineering; Xuchang University; No. 88, Bayi Road, Xuchang, Henan 461000 P. R. China
| | - Yongrui Dong
- Department of Chemistry; Kunming University; 650214 Kunming P. R. China
| | - Cunjie Lv
- School of Chemistry and Chemical Engineering; Xuchang University; No. 88, Bayi Road, Xuchang, Henan 461000 P. R. China
| | - Guangbin Fu
- School of Chemistry and Chemical Engineering; Xuchang University; No. 88, Bayi Road, Xuchang, Henan 461000 P. R. China
| | - Deqiang Liang
- Department of Chemistry; Kunming University; 650214 Kunming P. R. China
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43
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Zhang Z, Zhang L, Geng R, Song J, Chen X, Gong L. N‐Heterocyclic Carbene/Copper Cooperative Catalysis for the Asymmetric Synthesis of Spirooxindoles. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907188] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zi‐Jing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Ling Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Rui‐Long Geng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Xiao‐Hua Chen
- Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Center for Excellence in Molecular Synthesis of CAS Hefei, 230026 China
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44
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Lin Y, Zhao BL, Du DM. Bifunctional Squaramide-Catalyzed Asymmetric [3 + 2] Cyclization of 2-(1-Methyl-2-oxoindolin-3-yl)malononitriles with Unsaturated Pyrazolones To Construct Spirooxindole-Fused Spiropyrazolones. J Org Chem 2019; 84:10209-10220. [DOI: 10.1021/acs.joc.9b01268] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ye Lin
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing 100081, People’s Republic of China
| | - Bo-Liang Zhao
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing 100081, People’s Republic of China
| | - Da-Ming Du
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing 100081, People’s Republic of China
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45
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Dynamic stereoselective annulation via aldol-oxa-cyclization cascade reaction to afford spirooxindole pyran polycycles. Commun Chem 2019. [DOI: 10.1038/s42004-019-0177-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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46
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Liang D, Huo B, Dong Y, Wang Y, Dong Y, Wang B, Ma Y. Copper-Catalyzed Alkylarylation of Unactivated Alkenes: Synthesis of 3-Alkyl Indolines from N-Allyl Anilines and Alkanes. Chem Asian J 2019; 14:1932-1936. [PMID: 31046195 DOI: 10.1002/asia.201900176] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 03/26/2019] [Indexed: 01/14/2023]
Abstract
A rare example of C(sp3 )-H functionalization of simple alkanes with unactivated alkenes is presented. In the presence of a copper salt and di-tert-butyl peroxide (DTBP), N-allyl anilines underwent exo-selective alkylation/cyclization cascade with unactivated alkenic bonds as radical acceptors and simple alkanes as radical precursors, providing a direct access to 3-alkyl indolines. The present protocol features simple operation, broad substrate scope and great exo selectivity.
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Affiliation(s)
- Deqiang Liang
- Department of Chemistry, Kunming University, 2 Puxin Road, Kunming, Yunnan Province, 650214, China
| | - Bojie Huo
- Department of Chemistry, Kunming University, 2 Puxin Road, Kunming, Yunnan Province, 650214, China
| | - Yongrui Dong
- Department of Chemistry, Kunming University, 2 Puxin Road, Kunming, Yunnan Province, 650214, China
| | - Yan Wang
- Department of Chemistry, Kunming University, 2 Puxin Road, Kunming, Yunnan Province, 650214, China
| | - Ying Dong
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong Province, 250014, China
| | - Baoling Wang
- Yunnan Engineering Technology Research Center for Plastic Films, Kunming, Yunnan Province, 650214, China
| | - Yinhai Ma
- Department of Chemistry, Kunming University, 2 Puxin Road, Kunming, Yunnan Province, 650214, China
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47
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Synthesis of cyanoalkyl indolines through cyanoalkylarylation of N-allyl anilines with alkyl nitriles under metal-free and neutral conditions. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.05.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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48
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Huang W, Li X, Song X, Luo Q, Li Y, Dong Y, Liang D, Wang B. Benzylarylation of N-Allyl Anilines: Synthesis of Benzylated Indolines. J Org Chem 2019; 84:6072-6083. [PMID: 31021621 DOI: 10.1021/acs.joc.9b00237] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An unprecedented benzylic C-H functionalization of methyl arenes across unactivated alkenes is presented. In the presence of MnCl2·4H2O and di- tert-butyl peroxide, N-allyl anilines underwent benzylation/cyclization cascade to give benzylated indolines, which are a previously unmet synthetic goal. This protocol features simple operation, broad substrate scope, and great exo selectivity.
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Affiliation(s)
- Wenzhong Huang
- Department of Chemistry , Kunming University , Kunming 650214 , China
| | - Xiulan Li
- Department of Chemistry , Kunming University , Kunming 650214 , China
| | - Xuemei Song
- Department of Chemistry , Kunming University , Kunming 650214 , China
| | - Qing Luo
- Department of Chemistry , Kunming University , Kunming 650214 , China
| | - Yanping Li
- Department of Chemistry , Kunming University , Kunming 650214 , China
| | - Ying Dong
- College of Chemistry, Chemical Engineering and Materials Science , Shandong Normal University , Jinan 250014 , China
| | - Deqiang Liang
- Department of Chemistry , Kunming University , Kunming 650214 , China.,Yunnan Engineering Technology Research Center for Plastic Films , Kunming 650214 , China
| | - Baoling Wang
- Department of Chemistry , Kunming University , Kunming 650214 , China.,Yunnan Engineering Technology Research Center for Plastic Films , Kunming 650214 , China
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49
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Wang X, Zhao X, Li X, Huo B, Dong Y, Liang D, Ma Y. Brønsted acid-catalyzed radical C H functionalization of acetone with N-allyl anilines to give 3-(3-oxobutyl)indolines. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.04.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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50
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Tehri P, Peddinti RK. DBU-catalyzed [3 + 2] cycloaddition and Michael addition reactions of 3-benzylidene succinimides with 3-ylidene oxindoles and chalcones. Org Biomol Chem 2019; 17:3964-3970. [PMID: 30942810 DOI: 10.1039/c9ob00385a] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A metal-free DBU catalyzed protocol has been developed for the regioselective [3 + 2] cycloaddition reactions of 3-benzylidene succinimides with 3-ylidene oxindoles to furnish spirooxindole derivatives. The 3-benzylidene succinimides underwent Michael addition with chalcones to provide benzylidene succinimide-tethered propanones. All the reactions proceeded under mild conditions and the products were isolated by simple filtration and washing with ethanol in good yields. The current methodology utilizes simple precursors and provides functionally-rich succinimides with two to five contiguous stereocenters in excellent diastereoselectivity and with complete regioselectivity.
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Affiliation(s)
- Piyush Tehri
- Department of Chemistry, Indian Institute of Technology, Roorkee-247667, Uttarakhand, India.
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