1
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Li M, Chen Y, Tang H, Cheng W, Liao B, Wang Q, Yi W. One-pot formal [3 + 2] annulation of 2-pyridinyl-substituted p-quinone methides and arynes for the synthesis of 3-aryl pyrido[1,2- a]indoles. Org Biomol Chem 2024; 22:5618-5628. [PMID: 38910460 DOI: 10.1039/d4ob00684d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/25/2024]
Abstract
An efficient and metal-free method for the synthesis of 3-aryl pyrido[1,2-a]indoles from aryne intermediates and 2-pyridinyl-substituted p-QMs was successfully developed under ambient conditions. The reaction offered a novel and practical protocol to access some diverse functional molecules in good to excellent yields. The proposed mechanism indicated that the reaction proceeded via a formal [3 + 2] cycloaddition step.
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Affiliation(s)
- Mengfan Li
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China.
| | - Yan Chen
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China.
| | - Hao Tang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China.
| | - Wen Cheng
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China.
| | - Benren Liao
- Shanghai No.4 Reagent Chemical Co., Ltd, Shanghai 201512, P. R. China.
| | - Qingwei Wang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China.
| | - Weiyin Yi
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China.
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2
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Mitrofanov AY, Murashkina AV, Lyssenko KA, Beletskaya IP. Switchable Selectivity in the Annulation of o-Trifluoroacetylanilines and Activated Terminal Alkynes Based on Transition Metal and Phosphine Catalysis. Chemistry 2023; 29:e202302357. [PMID: 37593935 DOI: 10.1002/chem.202302357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 08/19/2023]
Abstract
In this work, we have developed selective methods for the synthesis of quinoline-2-carboxylates and quinoline-3-carboxylates as well as (indolin-2-ylidene)acetates through copper-, silver-, or phosphine-catalyzed reaction of propiolates with 2'-amino-2,2,2-trifluoroacetophenones. The approaches proposed ensure synthesis of substituted quinoline carboxylates and (indolin-2-ylidene)acetates in good yields. Introduction of alkynones into the reaction with 2'-amino-2,2,2-trifluoroacetophenones gives acyl substituted derivatives in good yields.
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Affiliation(s)
- Alexander Yu Mitrofanov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, GSP-1, Moscow, 119991, Russian Federation
| | - Arina V Murashkina
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, GSP-1, Moscow, 119991, Russian Federation
| | - Konstantin A Lyssenko
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, GSP-1, Moscow, 119991, Russian Federation
- G.V. Plekhanov Russian University of Economics, 36 Stremyanny Per., Moscow, 117997, Russian Federation
| | - Irina P Beletskaya
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, GSP-1, Moscow, 119991, Russian Federation
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3
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Stockhammer L, Radetzky M, Khatoon SS, Bechmann M, Waser M. Chiral Lewis Base-Catalysed Asymmetric Syntheses of Benzo-fused ϵ-Lactones. European J Org Chem 2023; 26:e202300704. [PMID: 38601860 PMCID: PMC11005097 DOI: 10.1002/ejoc.202300704] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/24/2023] [Indexed: 04/12/2024]
Abstract
We herein report a two-step protocol for the asymmetric synthesis of novel chiral benzofused ϵ-lactones starting from O-protected hydroxymethyl-para-quinone methides and activated aryl esters. By using chiral isothiourea Lewis base catalysts a broad variety of differently substituted products could be obtained in yields of around 50 % over both steps with high levels of enantioselectivities, albeit low diastereoselectivities only.
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Affiliation(s)
- Lotte Stockhammer
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstrasse 694040LinzAustria
| | - Maximilian Radetzky
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstrasse 694040LinzAustria
| | - Syeda Sadia Khatoon
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstrasse 694040LinzAustria
| | - Matthias Bechmann
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstrasse 694040LinzAustria
| | - Mario Waser
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstrasse 694040LinzAustria
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4
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More DA, Ghotekar GS, Muthukrishnan M. BF 3 ⋅Et 2 O-Catalyzed Selective C-4 Alkylation of Isoquinolin-1(2H)-ones Employing p-Quinone Methides. Chem Asian J 2023; 18:e202300546. [PMID: 37449661 DOI: 10.1002/asia.202300546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/12/2023] [Accepted: 07/13/2023] [Indexed: 07/18/2023]
Abstract
The direct C-4 alkylation of isoquinolin-1(2H)-one moiety is a challenging transformation in organic synthesis. Here we present a practical and efficient synthesis of C-4 alkylated isoquinolin-1(2H)-ones through conjugate addition of isoquinolin-1(2H)-ones to p-quinone methides for the first time. The process is facilitated by Lewis acid catalysis and this operationally straightforward, mild, metal-free and one-pot transformation provides a wide range of C-4 alkylated isoquinolin-1(2H)-ones at ambient temperature in good to excellent yields.
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Affiliation(s)
- Devidas A More
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune, 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Ganesh S Ghotekar
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune, 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - M Muthukrishnan
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune, 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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5
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Deng YH, Xu WL, Wang L, Tang CY, Fu JY, Zhang CB. Regio- and diastereoselective synthesis of diverse spirocyclic indenes by cyclization with indene-dienes as two carbon building blocks. Org Biomol Chem 2023; 21:6681-6686. [PMID: 37540130 DOI: 10.1039/d3ob00982c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
We report a base-promoted cyclization with indene-dienes as two carbon building blocks toward diverse spirocyclic indene scaffolds including hexacyclic spiroindenes bearing benzo pyran motifs and pentacyclic spiroindenes containing oxindole units in high yields with excellent diastereoselectivities.
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Affiliation(s)
- Yi-Hang Deng
- Henan Engineering Research Center of Functional Materials and Catalytic Reaction, College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, China.
| | - Wen-Li Xu
- Henan Engineering Research Center of Functional Materials and Catalytic Reaction, College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, China.
| | - Lei Wang
- Henan Engineering Research Center of Functional Materials and Catalytic Reaction, College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, China.
| | - Cheng-Yang Tang
- Henan Engineering Research Center of Functional Materials and Catalytic Reaction, College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, China.
| | - Ji-Ya Fu
- Henan Engineering Research Center of Functional Materials and Catalytic Reaction, College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, China.
| | - Chuan-Bao Zhang
- Henan Engineering Research Center of Functional Materials and Catalytic Reaction, College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, China.
- School of Pharmacy, Zhengzhou Railway Vocational & Technical College, Zhengzhou 450052, China.
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6
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Gaikwad RA, Savekar AT, Waghmode SB. Metal-Free Approach for Oxa-spirocyclohexadienones through [3 + 2]/[4 + 2] ipso-Cyclization of para-Quinone Methides with Halo Alcohols. J Org Chem 2023. [PMID: 37406306 DOI: 10.1021/acs.joc.3c00784] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
A facile one-pot metal-free, base-mediated formal [3 + 2] and [4 + 2] dearomative ipso-cycloaddition of para-quinone methides (p-QMs) with halo alcohols has been designed for the efficient construction of 2-oxa-spirocyclohexadienones in excellent yield under mild reaction conditions. The commercial availability of the bases, reagents, and convenient reaction procedure makes it an attractive method for ipso-cyclization.
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Affiliation(s)
- Ramesh A Gaikwad
- Department of Chemistry, Savitribai Phule Pune University (Formerly University of Pune), Ganeshkhind, Pune 411007, India
| | - Amol T Savekar
- Department of Chemistry, Savitribai Phule Pune University (Formerly University of Pune), Ganeshkhind, Pune 411007, India
| | - Suresh B Waghmode
- Department of Chemistry, Savitribai Phule Pune University (Formerly University of Pune), Ganeshkhind, Pune 411007, India
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7
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Bao X, Yu W, Wang L, Dong X, Wang G, Chen W, Li F, Chen D. Synthesis of 4-aryl-3,4-dihydrocoumarins and 4-aryl-4 H-chromenes via Er(OTf) 3-catalyzed cascade reactions of p-quinone methides with 1,3-dicarbonyl compounds. RSC Adv 2023; 13:15942-15946. [PMID: 37250229 PMCID: PMC10214920 DOI: 10.1039/d3ra02267f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 05/23/2023] [Indexed: 05/31/2023] Open
Abstract
The Er(OTf)3-catalyzed cascade cyclization reaction of para-quinone methides (p-QMs) with various 1,3-dicarbonyl compounds has been developed, which efficiently constructed a series of versatile 4-aryl-3,4-dihydrocoumarins and 4-aryl-4H-chromenes. Herein, we not only propose a novel cyclization strategy of p-QMs, but also provide an easy access to structurally diverse coumarins and chromenes.
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Affiliation(s)
- Xiaobo Bao
- College of Pharmacy, Jiangsu Vocational College of Medicine Yancheng 224005 China
| | - Wei Yu
- School of Pharmacy, Nanjing Medical University Nanjing 211166 China
| | - Lilin Wang
- Sir Run Run Hospital, Nanjing Medical University Nanjing 211166 China
| | - Xu Dong
- School of Pharmacy, Nanjing Medical University Nanjing 211166 China
| | - Guoli Wang
- School of Pharmacy, Nanjing Medical University Nanjing 211166 China
| | - Weilin Chen
- School of Pharmacy, Nanjing Medical University Nanjing 211166 China
| | - Fei Li
- School of Pharmacy, Nanjing Medical University Nanjing 211166 China
| | - Dongyin Chen
- School of Pharmacy, Nanjing Medical University Nanjing 211166 China
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8
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Chutia K, Dutta D, Sarmah M, Gogoi P. Synthesis of π-Extended Benzofulvenes: A Pd-Catalyzed Cascade Annulation Process Comprising C-C Bond Formation Followed by 1,6-Conjugate Addition. J Org Chem 2023. [PMID: 37079662 DOI: 10.1021/acs.joc.3c00035] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023]
Abstract
A Pd-catalyzed cascade annulation process comprising C-C bond formation followed by 1,6-conjugate addition for π-extended benzofulvenes is reported. This process is compatible with a wide range of functionalities for both the p-quinone methides and internal alkynes, leading to diverse π-extended benzofulvenes. Additionally, this strategy is also applicable for aryne annulation with p-quinone methides.
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Affiliation(s)
- Kangkana Chutia
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Dhiraj Dutta
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Manashi Sarmah
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India
| | - Pranjal Gogoi
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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9
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Reactions of Enaminones with p‐Quinone Methides: Access to 4H‐Chromene and 4H‐Chromen‐4‐one Derivatives. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Kaur N, Kumar P, Dutt S, Banerjee P. Accessing Complex Tetrahydrofurobenzo-Pyran/Furan Scaffolds via Lewis-Acid Catalyzed Bicyclization of Cyclopropane Carbaldehydes with Quinone Methides/Esters. J Org Chem 2022; 87:7905-7918. [PMID: 35658458 DOI: 10.1021/acs.joc.2c00566] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Herein, we report a straightforward one-pot synthesis of tetrahydrofurobenzopyran and tetrahydrofurobenzofuran systems via an in situ ring-expansion of the cyclopropane carbaldehydes followed by a [2 + n] cycloaddition with the quinone derivatives. The transformation not only unveils a new reaction mode of cyclopropane carbaldehydes with quinone methides/esters, but also promotes a step-efficient diastereoselective route to the sophisticatedly fused oxygen tricycles that can be further dehydrogenated to access the valued dihydro-2H-furo[2,3-b]chromene frameworks.
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Affiliation(s)
- Navpreet Kaur
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - Pankaj Kumar
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - Shiv Dutt
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - Prabal Banerjee
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
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11
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Diastereodivergent formal [4 + 1] cycloaddition of azoalkenes as one-carbon synthons. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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12
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Nikpassand M, Keyhani A, Fekri LZ, Varma RS. Mechanochemical synthesis of azo-linked 2-amino-4H-chromene derivatives using Fe3O4@SiO2@KIT-6-NH2@Schiff-base complex nanoparticles. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132065] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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13
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Gao H, Chen X, Wang PL, Shi MM, Shang LL, Guo HY, Li H, Li P. Electrochemical benzylic C-H arylation of xanthenes and thioxanthenes without catalyst and oxidant. Org Chem Front 2022. [DOI: 10.1039/d1qo01925b] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A catalyst-free and oxidant-free C-H arylation of xanthenes and thioxanthenes using electrochemistry has been developed, which affords a number of cross-coupling products in moderate to good yields. This method is...
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14
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Qin H, Xie Q, He L. Diastereoselective synthesis of chroman bearing spirobenzofuranone scaffolds via oxa-Michael/1,6-conjugated addition of para-quinone methides with benzofuranone-type olefins. RSC Adv 2022; 12:16684-16687. [PMID: 35754894 PMCID: PMC9169491 DOI: 10.1039/d2ra03031d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 05/29/2022] [Indexed: 12/17/2022] Open
Abstract
A simple and convenient cyclization of ortho-hydroxyphenyl-substituted para-quinone methides with benzofuran-2-one type active olefins via oxa-Michael/1,6-conjugated addition has been developed, which afforded an easy access to enriched functionalized chroman-spirobenzofuran-2-one scaffolds with good to excellent yields (up to 90%) and diastereoselectivities (up to >19 : 1 dr). This reaction provided an efficient method for constructing desired spirocyclic compounds combining both well-known heterocyclic pharmacophores chroman and benzofuran-2-one. Highly diastereoselective synthesis of spirocyclic compounds combining both well-known heterocyclic pharmacophores chroman and benzofuran-2-one.![]()
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Affiliation(s)
- Hongmei Qin
- College of Chemistry and Materials Engineering, Guiyang University, Guiyang, 550005, P. R. China
| | - Qimei Xie
- College of Chemistry and Chemical Engineering, China West Normal University, Nanchong, 637002, P. R. China
| | - Long He
- College of Chemistry and Materials Engineering, Guiyang University, Guiyang, 550005, P. R. China
- College of Chemistry and Chemical Engineering, China West Normal University, Nanchong, 637002, P. R. China
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15
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Qin H, Xie Q, HE LONG. Synthesis of Spiroindolenine Bearing Chroman Scaffolds Based on Cylization Reaction to para-Methylated Methides. NEW J CHEM 2022. [DOI: 10.1039/d2nj00936f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient diastereoselective cyclization reaction of ortho-hydroxyphenyl-substituted para-quinone methides with α,β-unsaturated imines generated in situ from aryl sulfonyl indoles was developed, which afforded spiroindolenine bearing chroman scaffolds in good to...
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16
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Dong T, Wei P, Li M, Gao F, Qin Y. Highly Diastereoselective Synthesis of Tetrahydroquinoline Derivatives via [4 + 2] Annulation of Ortho-Tosylaminophenyl-Substituted Para-Quinone Methides and Cyanoalkenes. Front Chem 2021; 9:764866. [PMID: 34805095 PMCID: PMC8595915 DOI: 10.3389/fchem.2021.764866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 10/19/2021] [Indexed: 11/13/2022] Open
Abstract
As a privileged structural motif, tetrahydroquinoline skeletons widely exist in biologically active natural products and pharmaceuticals. In this protocol, a highly diastereoselective [4 + 2] annulation of ortho-tosylaminophenyl-substituted p-QMs and cyanoalkenes to construct tetrahydroquinoline derivatives has been successfully achieved. This strategy proceeds efficiently under mild condition, offering straightforward route to a variety of 4-aryl-substituted tetrahydroquinolines with high yields, excellent diastereoselectivities, broad functional group tolerance as well as gram-scale capacity. Moreover, a one-pot reaction sequence utilizing in situ generated p-QMs under the similar condition to build tetrahydroquinoline framework is smoothly conducted with good reaction performance as well as step and atom economy.
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Affiliation(s)
- Taiwei Dong
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Peifeng Wei
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Min Li
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Feng Gao
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Yuan Qin
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Clinical Research Center for Oral Diseases, Department of Orthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, China
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17
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Abstract
A benzyne-mediated esterification of carboxylic acids and alcohols under mild conditions has been realized, which is made possible via a selective nucleophilic addition of carboxylic acid to benzyne in the presence of alcohol. After a subsequent transesterification with alcohol, the corresponding esters can be produced efficiently. This benzyne-mediated protocol can be used on the modification of Ibuprofen, cholesterol, estradiol, and synthesis of nandrolone phenylpropionate. In addition, benzyne can also be used to promote lactonization and amidation reaction.
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Affiliation(s)
- Jinlong Zhao
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, P. R. China, 400030
| | - Jiarong Shi
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, P. R. China, 400030
| | - Yang Li
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, P. R. China, 400030.,College of Chemistry, Jilin University, Changchun, P. R. China, 130012
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18
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Singh G, Pandey R, Pankhade YA, Fatma S, Anand RV. Construction of Oxygen- and Nitrogen-based Heterocycles from p-Quinone Methides. CHEM REC 2021; 21:4150-4173. [PMID: 34369640 DOI: 10.1002/tcr.202100137] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/25/2021] [Accepted: 06/28/2021] [Indexed: 01/08/2023]
Abstract
In the last few years, there has been an explosive growth in the area of para-quinone methide (p-QM) chemistry. This boom is actually due to the unique reactivity pattern of p-QMs, and also their remarkable synthetic applications. In fact, p-QMs serve as synthons for unsymmetrical diaryl- and triarylmethanes, and also for the construction of diverse range of carbocycles and heterocycles. In the last few years, a wide range of structurally complex heterocyclic frameworks could be accessed through the synthetic transformations of structurally modified stable p-QMs. Therefore, the main focus of this review article is to cover the recent advancements in the transition-metal, Lewis acid and base-catalyzed/mediated synthetic transformations of the stable p-quinone methides (p-QMs) to oxygen- and nitrogen-containing heterocycles.
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Affiliation(s)
- Gurdeep Singh
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, SAS Nagar, Manauli (PO), Punjab, 140306
| | - Rajat Pandey
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, SAS Nagar, Manauli (PO), Punjab, 140306
| | - Yogesh A Pankhade
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, SAS Nagar, Manauli (PO), Punjab, 140306
| | - Shaheen Fatma
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, SAS Nagar, Manauli (PO), Punjab, 140306
| | - Ramasamy Vijaya Anand
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, SAS Nagar, Manauli (PO), Punjab, 140306
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19
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Yu KY, Deng YH, Ge XM, An XT, Shu PF, Cao YX, Zhao XH, Fan CA. Tandem (2 + 2) Annulation/Retro-4π Electrocyclization/Imino-Nazarov Cyclization Reaction of p-Quinone Methides with Ynamides: Expeditious Construction of Functionalized Aminoindenes. Org Lett 2021; 23:5885-5890. [PMID: 34279973 DOI: 10.1021/acs.orglett.1c02003] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A new tandem annulation of p-quinone methides (p-QMs) with ynamides is described. This cascade reaction features a unique combination of (2 + 2) annulation, retro-4π electrocyclization, and imino-Nazarov cyclization, wherein vinyl p-quinone methides (p-VQMs) as one of the key intermediates have been identified chemically. Significantly, an unusual structural reconstruction of p-QMs involving the cleavage of the C5-C6 bond and the late-stage formation of the C4-C6 bond is involved, leading to a methodology development for the construction of functionalized aminoindenes.
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Affiliation(s)
- Ke-Yin Yu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Yu-Hua Deng
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Xiao-Min Ge
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Xian-Tao An
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Peng-Fei Shu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Ye-Xing Cao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Xian-He Zhao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Chun-An Fan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
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20
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Luo WF, Ye LW, Li L, Qian PC. Regio- and diastereoselective synthesis of trans-3,4-diaryldihydrocoumarins via metal-free [4+2] annulation of ynamides with o-hydroxybenzyl alcohols. Chem Commun (Camb) 2021; 57:5032-5035. [PMID: 33881063 DOI: 10.1039/d1cc00687h] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An efficient regio- and diastereoselective method for the construction of valuable trans-3,4-diaryldihydrocoumarins via metal-free [4+2] annulation of ynamides with o-hydroxybenzyl alcohols has been developed. Ynamides are first treated as 2-π partners to react with o-hydroxybenzyl alcohols via traceless sulfonamide directing groups, affording trans-3,4-diaryldihydrocoumarins in good yields with high regio- and diastereoselectivities. This metal-free methodology is also characterized by a wide substrate scope, good functional group tolerance, and efficiency on a gram scale.
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Affiliation(s)
- Wen-Feng Luo
- Institute of New Materials & Industry Technology, College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China.
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21
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Song Z, Jia Y, Zhang D, Wang D. DMAP Mediated Efficient Construction of Functionalized Chromenes through One‐Pot Reaction of
para
‐Quinone Methides with Allenoates. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100112] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Zefeng Song
- Molecular Synthesis Center Key Laboratory of Marine Drugs Ministry of Education School of Medicine and Pharmacy Ocean University of China & Laboratory for Marine Drugs and Bioproducts and Open Studio for Druggability Research of Marine Natural Products Pilot NLMST Qingdao China
| | - Yuping Jia
- Shandong Academy of Pharmaceutical Sciences Jinan Shandong China
| | - Daizhou Zhang
- Shandong Academy of Pharmaceutical Sciences Jinan Shandong China
| | - De Wang
- Molecular Synthesis Center Key Laboratory of Marine Drugs Ministry of Education School of Medicine and Pharmacy Ocean University of China & Laboratory for Marine Drugs and Bioproducts and Open Studio for Druggability Research of Marine Natural Products Pilot NLMST Qingdao China
- State Key Laboratory of Chemical Oncogenomics Key Laboratory of Chemical Genomics Peking University Shenzhen Graduate School Shenzhen 518055 Guangdong China
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22
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Affiliation(s)
- Jiarong Shi
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, P. R. China, 400030
| | - Lianggui Li
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, P. R. China, 400030
| | - Yang Li
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, P. R. China, 400030
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23
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Nan G, Zhan J, Yuan C, Wen L, Li M. NEt 3-Promoted Construction of Functionalized 4 H-Chromenes via [4+2] Cycloaddition Reaction of ortho-Quinone Methides with β-Ketothioamides. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202104005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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24
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Wang D, Kan L, Ma Y, Liu L. NaO tBu-Catalyzed Hydrophosphonylation of δ-CN- δ-aryl-disubstituted para-Quinone Methides with Phosphine Oxides. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202104003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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25
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Kumaran S, Prabhakaran M, Mariyammal N, Parthasarathy K. Catalyst-free 1,6-conjugate addition of indoles and 4-hydroxycoumarins to para-quinone methides: synthesis of unsymmetrical triarylmethanes. Org Biomol Chem 2020; 18:7837-7841. [PMID: 32996543 DOI: 10.1039/d0ob01789b] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalyst-free 1,6-conjugate addition of indoles and 4-hydroxycoumarins to para-quinone methides is reported. This protocol allowed us to access a range of unsymmetrical triarylmethanes in good to excellent yields. The outlined procedure is operationally simple, efficient, atom and step economical. The synthesized heterocyclic triarylmethanes were further converted into highly substituted indoloisoquinolines and pyranochromenones via metal-catalyzed C-H activation/annulation.
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Affiliation(s)
- Subramani Kumaran
- Department of Organic Chemistry, University of Madras, Guindy Campus, Tamil Nadu, Chennai 600025, India.
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26
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Wang Z, Huang A, Fang F, Li P, Liu G, Li W. Non-hydrogen bond catalyst-mediated diastereoselective conjugate additions of 5H-oxazol-4-ones to o-hydroxyphenyl-substituted p-quinone methides. Org Biomol Chem 2020; 18:6807-6811. [PMID: 32857073 DOI: 10.1039/d0ob01558j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An efficient DBU-catalyzed conjugate addition of 5H-oxazol-4-ones to o-hydroxyphenyl-substituted p-quinone methides has been developed, affording the valuable diarylmethanes in high yields with excellent diastereoselectivity. This strategy demonstrates a robust access to a wide range of diarylmethane derivatives possessing biologically significant o-hydroxyphenol and p-hydroxyphenol moieties under mild reaction conditions.
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Affiliation(s)
- Ziyang Wang
- Department of Medicinal Chemistry, School of Pharmacy, Qingdao University, Qingdao 266021, China.
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27
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Wang J, Pan X, Rong Q, Zhao L, Zhao L, Dai W, Zhao K, Hu L. One-pot synthesis of indoles and quinolinones from ortho-tosylaminophenyl-substituted para-quinone methides. RSC Adv 2020; 10:33455-33460. [PMID: 35515061 PMCID: PMC9056683 DOI: 10.1039/d0ra05497f] [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: 06/23/2020] [Accepted: 09/01/2020] [Indexed: 01/07/2023] Open
Abstract
A facile one-pot synthesis has been developed through alkylation/acylation of ortho-tosylaminophenyl-substituted para-quinone methides followed by an intramolecular 1,6-conjugate addition and oxidation sequence. This cascade reaction occurs readily in good yield (up to 95%), providing a divergent synthetic approach to structurally diverse 2,3-disubstituted indoles and 3,4-diaryl-substituted quinolinones.
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Affiliation(s)
- Junwei Wang
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine Nanjing P. R. China
| | - Xiang Pan
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine Nanjing P. R. China
| | - Quanjin Rong
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine Nanjing P. R. China
| | - Lei Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine Nanjing P. R. China
| | - Lin Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine Nanjing P. R. China
| | - Weichen Dai
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine Nanjing P. R. China
| | - Kun Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine Nanjing P. R. China
| | - Lihong Hu
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine Nanjing P. R. China
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28
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Stereoselective synthesis of 9-vinyl substituted unsymmetrical xanthenes and thioxanthenes. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152347] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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Wang J, Rong Q, Zhao L, Pan X, Zhao L, Zhao K, Hu L. Synthesis of 1,4-Dihydroquinolines and 4H-Chromenes via Organocatalytic Domino Aza/Oxa-Michael/1,6-Addition Reactions of para-Quinone Methides and Ynals. J Org Chem 2020; 85:11240-11249. [DOI: 10.1021/acs.joc.0c01315] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Junwei Wang
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Quanjin Rong
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Lei Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Xiang Pan
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Lin Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Kun Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Lihong Hu
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
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30
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31
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High diastereoselective [4 + 2] annulation of β,γ-unsaturated α-keto esters and p-quinone methides: Approach to polysubstituted 4-aryl chromans and tetrahydroquinolines. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152171] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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32
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Wang J, Zhao L, Zhao L, Pan X, Lv C, Zhi Y, Wang A, Zhao K, Hu L. Diastereoselective Synthesis of Tetrahydroquinolines Bearing Oxindole Scaffolds via Annulation of
in Situ
Generated
p
‐Quinone Methides. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000436] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Junwei Wang
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Lei Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Lin Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Xiang Pan
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Cheng Lv
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Ying Zhi
- Institute of Materia MedicaShandong First Medical University & Shandong Academy of Medical Science Jinan 250062 People's Republic of China
| | - Ai Wang
- Institute of Molecular ScienceShanxi University Taiyuan 030006 People's Republic of China
| | - Kun Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Lihong Hu
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
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33
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Serbian I, Loesche A, Sommerwerk S, Liebing P, Ströhl D, Csuk R. In the Mists of a Fungal Metabolite: An Unexpected Reaction of 2,4,5-Trimethoxyphenylglyoxylic Acid. Molecules 2020; 25:molecules25081978. [PMID: 32340302 PMCID: PMC7221594 DOI: 10.3390/molecules25081978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 04/09/2020] [Accepted: 04/21/2020] [Indexed: 11/30/2022] Open
Abstract
The reactions of phenylglyoxylic acids during the synthesis and biological evaluation of fungal metabolites led to the discovery of hitherto unknown compounds with a p-quinone methide (p-QM) structure. The formation of these p-QMs using 13C-labelled starting materials revealed a key-step of this reaction being a retro-Friedel–Crafts alkylation.
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Affiliation(s)
- Immo Serbian
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany; (I.S.); (A.L.); (S.S.); (D.S.)
| | - Anne Loesche
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany; (I.S.); (A.L.); (S.S.); (D.S.)
| | - Sven Sommerwerk
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany; (I.S.); (A.L.); (S.S.); (D.S.)
| | - Phil Liebing
- Otto von Guericke Universität Magdeburg, Chemisches Institut, Universitätsplatz 2, D-39106 Magdeburg, Germany;
| | - Dieter Ströhl
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany; (I.S.); (A.L.); (S.S.); (D.S.)
| | - René Csuk
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany; (I.S.); (A.L.); (S.S.); (D.S.)
- Correspondence: ; Tel.: +49-345-55-25660
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34
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Lima CGS, Pauli FP, Costa DCS, de Souza AS, Forezi LSM, Ferreira VF, de Carvalho da Silva F. para
-Quinone Methides as Acceptors in 1,6-Nucleophilic Conjugate Addition Reactions for the Synthesis of Structurally Diverse Molecules. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901796] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Carolina G. S. Lima
- Departamento de Química Orgânica; Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho 24020-150 Niterói RJ Brazil
| | - Fernanda P. Pauli
- Departamento de Química Orgânica; Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho 24020-150 Niterói RJ Brazil
| | - Dora C. S. Costa
- Departamento de Química Orgânica; Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho 24020-150 Niterói RJ Brazil
| | - Acácio S. de Souza
- Departamento de Química Orgânica; Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho 24020-150 Niterói RJ Brazil
| | - Luana S. M. Forezi
- Departamento de Química Orgânica; Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho 24020-150 Niterói RJ Brazil
| | - Vitor F. Ferreira
- Departamento de Tecnologia Farmacêutica; Universidade Federal Fluminense; 24241-000 Niterói RJ Brazil
| | - Fernando de Carvalho da Silva
- Departamento de Química Orgânica; Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho 24020-150 Niterói RJ Brazil
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35
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Maripally N, Reddy VR, Donthi R, Mutyala R, Chandra R. DMAP catalyzed addition-cyclization reaction of 2-hydroxyphenyl-para-quinone methide with nitroalkenes: Facile entry into highly substituted chromane derivatives. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151554] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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36
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Liang X, Xu H, Li H, Chen L, Lu H. Recyclable Bismuth Complex Catalyzed 1,6-Conjugate Addition of Various Nucleophiles to para
-Quinone Methides: Expedient Access to Unsymmetrical Diaryl- and Triarylmethanes. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901732] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Xianghao Liang
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 212003 Zhenjiang Jiangsu China
| | - Haiyan Xu
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 212003 Zhenjiang Jiangsu China
| | - Hanlin Li
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 212003 Zhenjiang Jiangsu China
| | - Lizhuang Chen
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 212003 Zhenjiang Jiangsu China
| | - Hongfei Lu
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 212003 Zhenjiang Jiangsu China
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37
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Mao W, Lin S, Zhang L, Lu H, Jia J, Xu Z. Gold-catalyzed domino reactions of alkynol and p-quinone methides: divergent synthesis of fused- and spiro-ketals. Org Chem Front 2020. [DOI: 10.1039/d0qo00022a] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A gold-catalyzed domino reaction of alkynyl alcohols and p-quinone methides to obtain divergent fused- and spiro-ketals has been developed.
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Affiliation(s)
- Wenxiu Mao
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Shiquan Lin
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Liang Zhang
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Haifeng Lu
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Jiong Jia
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Zhenghu Xu
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- People's Republic of China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry
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38
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Guin S, Gudimella SK, Samanta S. 1,6-Addition of vinyl p-quinone methides with cyclic sulfamidate imines: access to 4-hydroxyaryl-2,6-diarylpyridines. Org Biomol Chem 2020; 18:1337-1342. [DOI: 10.1039/c9ob02708d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A base-promoted 1,6-addition–cyclization reaction of vinyl para-quinone methides with cyclic sulfamidate imines in an open atmosphere is reported. This method delivers good to high yields of 2,4,6-trisubstituted pyridines with a valuable phenolic moiety at the C4-position.
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Affiliation(s)
- Soumitra Guin
- Indian Institute of Technology Indore
- Discipline of Chemistry
- Indore 453552
- India
| | | | - Sampak Samanta
- Indian Institute of Technology Indore
- Discipline of Chemistry
- Indore 453552
- India
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39
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Wang JY, Hao WJ, Tu SJ, Jiang B. Recent developments in 1,6-addition reactions of para-quinone methides (p-QMs). Org Chem Front 2020. [DOI: 10.1039/d0qo00387e] [Citation(s) in RCA: 106] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this review, we provide a comprehensive overview of recent progress in this rapidly growing field by summarizing the 1,6-conjugate addition and annulation reactions of p-QMs with consideration of their mechanisms and applications.
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Affiliation(s)
- Jia-Yin Wang
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
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40
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Xiang M, Li CY, Song XJ, Zou Y, Huang ZC, Li X, Tian F, Wang LX. Organocatalytic and enantioselective [4+2] cyclization between hydroxymaleimides and ortho-hydroxyphenyl para-quinone methide-selective preparation of chiral hemiketals. Chem Commun (Camb) 2020; 56:14825-14828. [DOI: 10.1039/d0cc06777f] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A highly effective and enantioselective organocatalytic [4+2] cyclization has been disclosed, and a series of new chiral hemiketals containing chromane and succinimide frameworks have been firstly prepared in excellent results with 100% atom efficacy.
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Affiliation(s)
- Min Xiang
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Chen-Yi Li
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Xiang-Jia Song
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Ying Zou
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Zhi-Cheng Huang
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Xia Li
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Fang Tian
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Li-Xin Wang
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
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41
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Bu HZ, Li HH, Luo WF, Luo C, Qian PC, Ye LW. Synthesis of 2 H-Chromenes via Unexpected [4 + 2] Annulation of Alkynyl Thioethers with o-Hydroxybenzyl Alcohols. Org Lett 2019; 22:648-652. [PMID: 31887060 DOI: 10.1021/acs.orglett.9b04421] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A novel Brønsted acid-catalyzed reaction of alkynyl thioethers with o-hydroxybenzyl alcohols via an unexpected formal [4 + 2] annulation has been developed. This metal-free protocol leads to the facile and practical synthesis of valuable polysubstituted 2H-chromenes in mostly good to excellent yields under mild reaction conditions and features a wide substrate scope and excellent functional group tolerance.
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Affiliation(s)
- Hao-Zhen Bu
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | - Hang-Hao Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | - Wen-Feng Luo
- Institute of New Materials & Industry Technology, College of Chemistry & Materials Engineering , Wenzhou University , Wenzhou 325035 , China
| | - Chen Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | - Peng-Cheng Qian
- Institute of New Materials & Industry Technology, College of Chemistry & Materials Engineering , Wenzhou University , Wenzhou 325035 , China
| | - Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China.,State Key Laboratory of Organometallic Chemistry , Chinese Academy of Sciences , Shanghai 200032 , China
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42
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Cheng X, Zhou S, Xu G, Wang L, Yang Q, Xuan J. [4+2]‐Cycloaddition of
para
‐Quinone Methides with Hexahydro‐1,3,5‐Triazines: Access to 1,3‐Benzoxazine Derivatives. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901169] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Xiao Cheng
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering Anhui University, Hefei Anhui 230601 People's Republic of China
| | - Shuang‐Jing Zhou
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering Anhui University, Hefei Anhui 230601 People's Republic of China
| | - Guo‐Yong Xu
- Institute of Physical Science and Information Technology Anhui University, Hefei Anhui 230601 People's Republic of China
| | - Long Wang
- China Three Gorges University, College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, Yichang Hubei 443002 People's Republic of China
| | - Qing‐Qing Yang
- China Three Gorges University, College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, Yichang Hubei 443002 People's Republic of China
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering Anhui University, Hefei Anhui 230601 People's Republic of China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University) Ministry of Education Hefei 230601 People's Republic of China
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43
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Singh G, Kumar S, Chowdhury A, Vijaya Anand R. Base-Mediated One-pot Synthesis of Oxygen-Based Heterocycles from 2-Hydroxyphenyl-Substituted para-Quinone Methides. J Org Chem 2019; 84:15978-15989. [DOI: 10.1021/acs.joc.9b02455] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Gurdeep Singh
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S. A. S. Nagar, Manauli (PO), Punjab 140306, India
| | - Suresh Kumar
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S. A. S. Nagar, Manauli (PO), Punjab 140306, India
| | - Arjun Chowdhury
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S. A. S. Nagar, Manauli (PO), Punjab 140306, India
| | - Ramasamy Vijaya Anand
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S. A. S. Nagar, Manauli (PO), Punjab 140306, India
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44
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Liou YC, Karanam P, Jang YJ, Lin W. Synthesis of Functionalized Benzofurans from para-Quinone Methides via Phospha-1,6-Addition/O-Acylation/Wittig Pathway. Org Lett 2019; 21:8008-8012. [DOI: 10.1021/acs.orglett.9b03001] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yan-Cheng Liou
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan, R.O.C
| | - Praneeth Karanam
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan, R.O.C
| | - Yeong-Jiunn Jang
- Chinese Medicine Research and Development Center, China Medical University Hospital, 2, Yuh-Der Road, Taichung 40447, Taiwan, R.O.C
| | - Wenwei Lin
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan, R.O.C
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45
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Liu Z, Xu H, Yao T, Zhang J, Liu L. Catalyst-Enabled Chemodivergent Construction of Alkynyl- and Vinyl-Substituted Diarylmethanes from p-Quinone Methides and Alkynes. Org Lett 2019; 21:7539-7543. [DOI: 10.1021/acs.orglett.9b02810] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhenli Liu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
| | - Haofeng Xu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
| | - Tengfei Yao
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
| | - Junliang Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
| | - Lu Liu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai 200062, P.R. China
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46
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Zhang L, Han Y, Huang A, Zhang P, Li P, Li W. Organocatalytic Remote Stereocontrolled 1,8-Additions of Thiazolones to Propargylic Aza- p-quinone Methides. Org Lett 2019; 21:7415-7419. [PMID: 31486650 DOI: 10.1021/acs.orglett.9b02726] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A remote stereocontrolled 1,8-conjugate addition of thiazolones to propargylic aza-p-quinone methides formed from propargylic alcohols has been developed with the aid of a chiral phosphoric acid, and this represents the first report on organocatalytic stereocontrolled 1,8-addition of propargylic aza-p-quinone methides. Notably, the remote stereocontrolled activation protocol enables the construction of vicinal sulfur-containing quaternary carbon stereocenters and axially chiral tetrasubstituted allenes and promotes the chemistry of chiral phosphoric acids.
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Affiliation(s)
- Lili Zhang
- Department of Medicinal Chemistry, School of Pharmacy , Qingdao University , Qingdao 266021 , P. R. China
| | - Yuzhe Han
- Department of Chemistry and Shenzhen Key Laboratory of Marine Archaea Geo-Omics , Southern University of Science and Technology , Shenzhen 518055 , P. R. China
| | - Anqi Huang
- Department of Medicinal Chemistry, School of Pharmacy , Qingdao University , Qingdao 266021 , P. R. China
| | - Pei Zhang
- Department of Medicinal Chemistry, School of Pharmacy , Qingdao University , Qingdao 266021 , P. R. China
| | - Pengfei Li
- Department of Chemistry and Shenzhen Key Laboratory of Marine Archaea Geo-Omics , Southern University of Science and Technology , Shenzhen 518055 , P. R. China
| | - Wenjun Li
- Department of Medicinal Chemistry, School of Pharmacy , Qingdao University , Qingdao 266021 , P. R. China
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47
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Aher YN, Pawar AB. Catalyst- and reagent-free 1,6-hydrophosphonylation of p-quinone methides: a practical approach for the synthesis of diarylmethyl phosphine oxides. Org Biomol Chem 2019; 17:7536-7546. [PMID: 31369029 DOI: 10.1039/c9ob01326a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We developed a catalyst-, reagent-, and additive-free protocol with 100% atom economy for the synthesis of diarylmethyl phosphine oxides via 1,6-hydrophosphonylation of p-quinone methides using water as a green solvent. The reaction showed broad scope with excellent functional group tolerance. The practicability of this method was demonstrated by carrying out the reaction on the gram scale whereby product was obtained in high yield by the filtration technique avoiding chromatographic purification.
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Affiliation(s)
- Yogesh N Aher
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
| | - Amit B Pawar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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48
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Zielke K, Kováč O, Winter M, Pospíšil J, Waser M. Enantioselective Catalytic [4+1]-Cyclization of ortho-Hydroxy-para-Quinone Methides with Allenoates. Chemistry 2019; 25:8163-8168. [PMID: 31020717 PMCID: PMC6618147 DOI: 10.1002/chem.201901784] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Indexed: 12/25/2022]
Abstract
The first highly asymmetric catalytic synthesis of densely functionalized dihydrobenzofurans is reported, which starts from ortho-hydroxy-containing para-quinone methides. The reaction relies on an unprecedented formal [4+1]-annulation of these quinone methides with allenoates in the presence of a commercially available chiral phosphine catalyst. The chiral dihydrobenzofurans were obtained as single diastereomers in yields up to 90 % and with enantiomeric ratios up to 95:5.
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Affiliation(s)
- Katharina Zielke
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstraße 694040LinzAustria
| | - Ondřej Kováč
- Department of Organic ChemistryFaculty of SciencePalacky Universitytř. 17. listopadu 1192/12771 46OlomoucCzech Republic
| | - Michael Winter
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstraße 694040LinzAustria
| | - Jiří Pospíšil
- Department of Organic ChemistryFaculty of SciencePalacky Universitytř. 17. listopadu 1192/12771 46OlomoucCzech Republic
- Laboratory of Growth RegulatorsThe Czech Academy of Sciences, Institute of Experimental Botany & Palacký UniversityŠlechtitelů 2778371OlomoucCzech Republic
| | - Mario Waser
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstraße 694040LinzAustria
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49
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Zhang B, Liu L, Mao S, Zhou MD, Wang H, Li L. Base-Catalyzed 1,6-Hydrophosphonylation of p
-Quinone Methides with Diphenylphosphane Oxide/Phosphites. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900606] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Bin Zhang
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1, Fushun 113001 P. R. China
| | - Lu Liu
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1, Fushun 113001 P. R. China
| | - Shukuan Mao
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1, Fushun 113001 P. R. China
| | - Ming-Dong Zhou
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1, Fushun 113001 P. R. China
| | - He Wang
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1, Fushun 113001 P. R. China
| | - Lei Li
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1, Fushun 113001 P. R. China
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50
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Zhang W, Yang C, Zhang ZP, Li X, Cheng JP. Visible-Light-Triggered Cyanoalkylation of para-Quinone Methides and Its Application to the Synthesis of GPR40 Agonists. Org Lett 2019; 21:4137-4142. [DOI: 10.1021/acs.orglett.9b01325] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wei Zhang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Chen Yang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Zhi-Pei Zhang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Xin Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
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