1
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Kamilya C, Gorad SS, Ghorai P. An Organocatalytic Highly Enantioselective Stereospecific Synthesis of 1,1-Disubstituted-1,3-Dihydroisobenzofurans. Chemistry 2024; 30:e202303980. [PMID: 38391113 DOI: 10.1002/chem.202303980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/16/2024] [Accepted: 02/22/2024] [Indexed: 02/24/2024]
Abstract
Herein, we disclosed the asymmetric construction of an oxa-quaternary stereocenter via an intramolecular oxa-Michael (IOM) reaction in β-substituted ortho-hydroxymethyl chalcone by the formation of 1,1-disubstituted-1,3-dihydroisobenzofuran using cinchona alkaloid-based chiral amino-squaramide catalyst. Both the (E- and Z)-β-substituted ortho-hydroxymethyl chalcone provide (S)- and (R)-enantiomers of the 1,1-disubstituted-1,3-dihydroisobenzofuran with excellent stereospecificity. In general, excellent yields (up to 95 %) and enantioselectivity (up to 98 % ee) were obtained. Furthermore, the resulting 1,1-disubstituted isobenzofuran or phthalan was converted to corresponding chiral 3,3-disubstituted phthalides without losing the enantioselectivity. This methodology provides the core moiety of the (S)-citalopram drug.
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Affiliation(s)
- Chandan Kamilya
- Department of Chemistry Indian Institute of Science Education and Research (IISER)Bhopal, Bhopal By-pass Road, Bhauri
| | - Sachin S Gorad
- Department of Chemistry Indian Institute of Science Education and Research (IISER)Bhopal, Bhopal By-pass Road, Bhauri
| | - Prasanta Ghorai
- Department of Chemistry Indian Institute of Science Education and Research (IISER)Bhopal, Bhopal By-pass Road, Bhauri
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2
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Wang J, Huang H, Gao H, Qin G, Xiao T, Jiang Y. DBU/AgOTf Relay‐Catalysis Enabled One‐Pot Synthesis of 1,3‐Dihydroisobenzofurans and Its Conversion to Indanones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jiazhuang Wang
- Faculty of Science Kunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Hongtai Huang
- Faculty of Science Kunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Haotian Gao
- Faculty of Science Kunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Guiping Qin
- Faculty of Science Kunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Tiebo Xiao
- Faculty of Science Kunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Yubo Jiang
- Faculty of Science Kunming University of Science and Technology Kunming 650500 People's Republic of China
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3
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Wang Y, Xu N, Li W, Li J, Huo Y, Zhu W, Liu Q. Synthesis of 1,3-diselenyl-dihydroisobenzofurans via electrochemical radical selenylation with substituted o-divinylbenzenes and diselenides. Org Biomol Chem 2022; 20:2813-2817. [PMID: 35319056 DOI: 10.1039/d2ob00254j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
An efficient electrochemical method for the direct synthesis of complicated 1,3-diselenyl-dihydroisobenzofurans was developed under external oxidant free conditions at room temperature from substituted o-divinylbenzenes and diselenides. A radical mechanism is proposed for this novel and practical transformation.
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Affiliation(s)
- Ying Wang
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Ocean University; School of Pharmacy, Jiangsu Ocean University, Lianyungang, 222005, Jiangsu, China.
| | - Ning Xu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, China
| | - Weiwei Li
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Ocean University; School of Pharmacy, Jiangsu Ocean University, Lianyungang, 222005, Jiangsu, China.
| | - Jiaojiao Li
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Ocean University; School of Pharmacy, Jiangsu Ocean University, Lianyungang, 222005, Jiangsu, China.
| | - Yijun Huo
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Ocean University; School of Pharmacy, Jiangsu Ocean University, Lianyungang, 222005, Jiangsu, China.
| | - Wenrong Zhu
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Ocean University; School of Pharmacy, Jiangsu Ocean University, Lianyungang, 222005, Jiangsu, China.
| | - Qiang Liu
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Ocean University; School of Pharmacy, Jiangsu Ocean University, Lianyungang, 222005, Jiangsu, China.
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4
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Roy TK, Gorad SS, Ghorai P. Chiral Squaramide Catalyzed Asymmetric Spiroketalization toward Aromatic [6,5] Spiroketals. Org Lett 2022; 24:1889-1894. [PMID: 35238574 DOI: 10.1021/acs.orglett.2c00074] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein is disclosed an efficient enantio- and diastereoselective spiroketalization of aromatic ketone tethered to ortho-homoformyl and enone moiety via in situ enol formation using quinine derived squaramide organocatalyst to access aromatic [6,5] spiroketals with complete atom economy. Furthermore, aromatic spiroketals undergo Brønsted acid catalyzed Piancatelli type rearrangement to provide dihydronaphtho[1,2-b]furans with retention of the enantioselectivities.
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Affiliation(s)
- Tarun Kumar Roy
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, India
| | - Sachin S Gorad
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, India
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5
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Sader JK, Molder BA, Wulff JE. A Chan-Evans-Lam approach to trisubstituted vinyl ethers. Org Biomol Chem 2021; 19:9649-9653. [PMID: 34730598 DOI: 10.1039/d1ob01827b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Trisubstituted vinyl ethers were accessed via Chan-Evans-Lam coupling of vinyl trifluoroborates and primary aliphatic alcohols. This approach complements prior methods that required the use of neat liquid alcohol coupling partners. A palladium-catalyzed redox-relay Heck reaction was used to convert several vinyl ethers into aldehyde-functionalized 1,3-dihydroisobenzofurans.
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Affiliation(s)
- Jonathan K Sader
- Department of Chemistry, University of Victoria, PO Box 3065 STN CSC, Victoria, British Columbia, Canada, V8W 3V6.
| | - Bryce A Molder
- Department of Chemistry, University of Victoria, PO Box 3065 STN CSC, Victoria, British Columbia, Canada, V8W 3V6.
| | - Jeremy E Wulff
- Department of Chemistry, University of Victoria, PO Box 3065 STN CSC, Victoria, British Columbia, Canada, V8W 3V6.
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6
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Son EC, No J, Kim S. Organocatalytic enantioselective synthesis of phthalans via Wittig/
oxa‐Michael
cascade reaction. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Eun Chae Son
- Department of Chemistry Kyonggi University Suwon Republic of Korea
| | - Jaeeun No
- Department of Chemistry Kyonggi University Suwon Republic of Korea
| | - Sung‐Gon Kim
- Department of Chemistry Kyonggi University Suwon Republic of Korea
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7
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Convenient synthesis of flavanone derivatives via oxa-Michael addition using catalytic amount of aqueous cesium fluoride. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153480] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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8
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Chen X, Zhao R, Liu Z, Sun S, Ma Y, Liu Q, Sun X, Liu L. Redox deracemization of α-substituted 1,3-dihydroisobenzofurans. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.02.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Ma SS, Jiang BL, Yu ZK, Zhang SJ, Xu BH. Cobalt-Catalyzed Chemoselective Transfer Hydrogenative Cyclization Cascade of Enone-Tethered Aldehydes. Org Lett 2021; 23:3873-3878. [PMID: 33960792 DOI: 10.1021/acs.orglett.1c00992] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The ligand-free Co-catalyzed chemoselective reductive cyclization cascade of enone-tethered aldehydes with i-PrOH as the environmentally benign hydrogen surrogate is developed by this study. Mechanistic studies disclosed that such a protocol is initiated by an ortho-enone-assisted Co(I)-catalyzed reduction of the aldehyde functionality with i-PrOH. Meanwhile, the selectivity from the Michael-Aldol cycloreduction cascade to the oxa-Michael cascade is feasible and readily adjusted by the addition of steric Lewis bases, such as TEMPO and DABCO, delivering substituted 1H-indenes and dihydroisobenzofurans, respectively.
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Affiliation(s)
- Shuang-Shuang Ma
- Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, Institution of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.,College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Biao-Ling Jiang
- Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, Institution of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Zheng-Kun Yu
- Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
| | - Suo-Jiang Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, Institution of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.,College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bao-Hua Xu
- Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, Institution of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.,College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.,Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
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10
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Son EC, Kim SY, Kim SG. Squaramide-Catalyzed Asymmetric Intramolecular Oxa-Michael Reaction of α,β-Unsaturated Carbonyls Containing Benzyl Alcohol: Construction of Chiral 1-Substituted Phthalans. J Org Chem 2021; 86:6826-6839. [PMID: 33904749 DOI: 10.1021/acs.joc.1c00715] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Organocatalytic enantioselective intramolecular oxa-Michael reactions of benzyl alcohol bearing α,β-unsaturated carbonyls as Michael acceptors are presented herein. Using cinchona squaramide-based organocatalyst, enones as well as α,β-unsaturated esters containing benzyl alcohol provided their corresponding 1,3-dihydroisobenzofuranyl-1-methylene ketones and 1,3-dihydroisobenzofuranyl-1-methylene esters in excellent yields with high enantioselectivities. In addition, enantioenriched 1,3-dihydroisobenzofuranyl-1-methylene ketone could be obtained from the Wittig/oxa-Michael reaction cascade of 1,3-dihydro-2-benzofuran-1-ol.
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Affiliation(s)
- Eun Chae Son
- Department of Chemistry, College of Natural Science, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon 16227, Republic of Korea
| | - Seung Yeon Kim
- Department of Chemistry, College of Natural Science, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon 16227, Republic of Korea
| | - Sung-Gon Kim
- Department of Chemistry, College of Natural Science, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon 16227, Republic of Korea
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11
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Kostenko AA, Bykova KA, Kucherenko AS, Komogortsev AN, Lichitsky BV, Zlotin SG. 2-Nitroallyl carbonate-based green bifunctional reagents for catalytic asymmetric annulation reactions. Org Biomol Chem 2021; 19:1780-1786. [PMID: 33543186 DOI: 10.1039/d0ob02283g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
2-Nitroallylic carbonates, a new class of "green" 1,3-bielectrophilic reagents for organic synthesis and catalysis, have been prepared. The bifunctional tertiary amine-catalyzed asymmetric [3 + 3] annulations of cyclic enols with these reagents occur much faster than corresponding reactions with 2-nitroallylic esters and produce no acidic by-products poisoning the catalyst. Furthermore, 2-nitroallylic carbonates enable highly enantioselective one-pot synthesis of a variety of fused dihydropyrane derivatives from available precursors bearing pharmacophoric fragments.
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Affiliation(s)
- Alexey A Kostenko
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991, Moscow, Russian Federation.
| | - Kseniya A Bykova
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991, Moscow, Russian Federation.
| | - Alexander S Kucherenko
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991, Moscow, Russian Federation.
| | - Andrey N Komogortsev
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991, Moscow, Russian Federation.
| | - Boris V Lichitsky
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991, Moscow, Russian Federation.
| | - Sergei G Zlotin
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991, Moscow, Russian Federation.
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12
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Lv XJ, Ming YC, Wu HC, Liu YK. Brønsted acid-catalyzed dynamic kinetic resolution of in situ formed acyclic N,O-hemiaminals: cascade synthesis of chiral cyclic N,O-aminals. Org Chem Front 2021. [DOI: 10.1039/d1qo01135a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A H2O controlled dynamic kinetic resolution was involved in a Brønsted acid-catalyzed acyclic N,O-hemiaminal formation/oxa-Michael reaction cascade, leading to highly enantioenriched cis-2,6-disubstituted tetrahydropyrans bearing an exo amide group.
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Affiliation(s)
- Xue-Jiao Lv
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Yong-Chao Ming
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Hui-Chun Wu
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Yan-Kai Liu
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
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13
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Peng T, Zhu H, Xu Y, Li D, Wang Y, Wang L, Liu X, Yang D, Wang R. Synergistic zinc catalyst mediated oxa-Michael kinetic resolution reaction. Org Chem Front 2021. [DOI: 10.1039/d1qo00402f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An oxa-Michael kinetic resolution reaction is developed to efficiently construct complexed polycyclic motifs by developing novel bifunctional zinc catalysts.
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Affiliation(s)
- Tianyu Peng
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Haiyong Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Yingfan Xu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Dan Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Yuan Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Linqing Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Xin Liu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Dongxu Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
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14
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Ahmad T, Ullah N. The oxa-Michael reaction in the synthesis of 5- and 6-membered oxygen-containing heterocycles. Org Chem Front 2021. [DOI: 10.1039/d0qo01312a] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In this review, we provide an updated account on the recent advances and applications of oxa-Michael reaction in the synthesis 5- and 6-membered monocyclic oxygen-containing heterocyclic compounds published in the literature since 2013 to date.
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Affiliation(s)
- Tauqir Ahmad
- Chemistry Department
- King Fahd University of Petroleum and Minerals
- Dhahran 31261
- Saudi Arabia
| | - Nisar Ullah
- Chemistry Department
- King Fahd University of Petroleum and Minerals
- Dhahran 31261
- Saudi Arabia
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15
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Bifunctional Cinchona Alkaloid Catalyzed Vinylogous Michael Reaction of 3–Alkylideneoxindole with 4‐Oxo‐enoates: A Route to Chiral γ‐Keto Alkylideneoxindole Esters. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000227] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Tandem nucleophilic addition/oxa-Michael reaction of ortho-formyl chalcones with dimethyl (diazomethyl)phosphonate for the synthesis of phosphine-containing 1,3-disubstituted phthalans. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Chen CT, Maity NC, Agarwal R, Lai CF, Liao Y, Yu WR. Chiral Vanadyl(V) Complexes Enable Efficient Asymmetric Reduction of β-Ketoamides: Application toward ( S)-Duloxetine. J Org Chem 2020; 85:6408-6419. [PMID: 32321244 DOI: 10.1021/acs.joc.0c00221] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
High-valent chiral oxidovanadium(V) complexes derived from 3,5-substituted-N-salicylidene-l-tert-leucine were used as catalysts in asymmetric reduction of N-benzyl-β-ketoamides. Among six different solvents, three different alcohol additives, and two different boranes examined, the use of pinacolborane in tetrahydrofuran (THF) with a t-BuOH additive led to the best results at -20 °C. The corresponding β-hydroxyamides can be furnished with yields up to 92% and an enantiomeric excess (ee) up to 99%. We have successfully extended this catalytic protocol for the synthesis of an (S)-duloxetine precursor.
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Affiliation(s)
- Chien-Tien Chen
- Department of Chemistry, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Nabin Ch Maity
- Department of Chemistry, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Rachit Agarwal
- Department of Chemistry, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Chien-Fu Lai
- Department of Chemistry, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Yiya Liao
- Department of Chemistry, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Wei-Ru Yu
- Department of Chemistry, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
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18
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Wang Y, Du DM. Recent advances in organocatalytic asymmetric oxa-Michael addition triggered cascade reactions. Org Chem Front 2020. [DOI: 10.1039/d0qo00631a] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this review, we summarized recent advances in organocatalytic asymmetric oxa-Michael addition triggered cascade reactions.
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Affiliation(s)
- Yu Wang
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing 100081
- P. R. China
| | - Da-Ming Du
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing 100081
- P. R. China
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19
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Enantioselective, Organocatalytic, Dissymmetric 1,4- and 1,2-Addition of Malononitrile to a Keto-bisenone Followed by an Oxa-Michael Addition Cascade. Org Lett 2019; 21:5793-5797. [PMID: 31298544 DOI: 10.1021/acs.orglett.9b01705] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An unprecedented enantioselective dissymmetric 1,4- and 1,2-addition of malononitrile to a keto-bisenone followed by an oxa-Michael addition cascade to trap the in situ generated unstable tertiary alcohol have been developed. The quinine-derived amino-squaramide bifunctional organocatalyst worked efficiently and provides the oxa-spiro-[4,4]-nonanes in good yields and excellent diastereo- and enantioselectivities (up to 99:1 dr and 99% ee). Notably, a complete chemoselective addition of a methylene unit to an aliphatic-tethered enone over the aromatic-tethered enone was observed.
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20
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Reddy RR, Panda S, Ghorai P. Enantioselective Synthesis of Cyclohexadienone Containing Spiroketals via DyKat Ketalization/oxa-Michael Addition Cascade. J Org Chem 2019; 84:5357-5368. [PMID: 30884234 DOI: 10.1021/acs.joc.9b00371] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
An oxidative dearomatization of phenol followed by a dynamic kinetic (DyKat) ketalization/oxa-Michael addition cascade using cinchona alkaloid-based chiral bifunctional amino-squaramide catalysts is reported. A broad array of sterically hindered [5,5]-spiroketals attached to a cyclohexadienone moiety in spiro-fashion is synthesized in an enantiopure form. Further, the methodology was optimized and extended to the corresponding benzannulated [5,5]-spiroketals attached to a cyclohexadienone moiety in spiro-fashion. In general, good yields and excellent diastereoselectivies and enantioselectivities (up to 20:1 dr and up to 99% ee) were obtained.
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Affiliation(s)
- Reddy Rajasekhar Reddy
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road , Bhauri , Bhopal 462066 , India
| | - Shibaram Panda
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road , Bhauri , Bhopal 462066 , India
| | - Prasanta Ghorai
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road , Bhauri , Bhopal 462066 , India
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21
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Li QH, Zhang GS, Wang YH, Mei MS, Wang X, Liu Q, Yang XD, Tian P, Lin GQ. A novel chiral DMAP–thiourea bifunctional catalyst catalyzed enantioselective Steglich and Black rearrangement reactions. Org Chem Front 2019. [DOI: 10.1039/c9qo00691e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A novel chiral DMAP–thiourea bifunctional catalyst has been prepared and applied in the highly enantioselective Steglich and Black rearrangement reactions.
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Affiliation(s)
- Qing-Hua Li
- The Research Center of Chiral Drugs
- Innovation Research Institute of Traditional Chinese Medicine
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Gui-Shan Zhang
- The Research Center of Chiral Drugs
- Innovation Research Institute of Traditional Chinese Medicine
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Yu-Hui Wang
- The Research Center of Chiral Drugs
- Innovation Research Institute of Traditional Chinese Medicine
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Ming-Shun Mei
- The Research Center of Chiral Drugs
- Innovation Research Institute of Traditional Chinese Medicine
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Xin Wang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Qiang Liu
- The Research Center of Chiral Drugs
- Innovation Research Institute of Traditional Chinese Medicine
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Xiao-Di Yang
- The Research Center of Chiral Drugs
- Innovation Research Institute of Traditional Chinese Medicine
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Ping Tian
- The Research Center of Chiral Drugs
- Innovation Research Institute of Traditional Chinese Medicine
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Guo-Qiang Lin
- The Research Center of Chiral Drugs
- Innovation Research Institute of Traditional Chinese Medicine
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
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22
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Chen D, Chemler SR. Synthesis of Phthalans Via Copper-Catalyzed Enantioselective Cyclization/Carboetherification of 2-Vinylbenzyl Alcohols. Org Lett 2018; 20:6453-6456. [PMID: 30336677 DOI: 10.1021/acs.orglett.8b02766] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Enantiomerically enriched phthalans were synthesized efficiently via an enantioselective copper-catalyzed alkene carboetherification reaction. In this reaction, 2-vinylbenzyl alcohols enantioselectively cyclize then couple with vinylarenes. The utility of the method was demonstrated by the enantioselective synthesis of ( R)-fluspidine, a σ1 receptor ligand.
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Affiliation(s)
- Dake Chen
- Department of Chemistry , State University of New York at Buffalo , Buffalo , New York 14260 , United States
| | - Sherry R Chemler
- Department of Chemistry , State University of New York at Buffalo , Buffalo , New York 14260 , United States
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23
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Hazra G, Pratap S, Ghorai P. Organocatalytic, Chemoselective Hydrophosphenylation/oxa-Michael Addition Cascade toward Diastereo- and Enantioenriched 1,3-Dihydroisobenzofuryl Phosphonates. J Org Chem 2018; 83:9654-9666. [PMID: 30086628 DOI: 10.1021/acs.joc.8b01048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
An efficient method for the construction of chiral C-P bond via an enantioselective 1,2-hydrophosphenylation followed by an oxa-Michael addition cascade of ortho-formyl chalcones has been developed. This provides the diastereoenriched ( cis)-1,3-dihydroisobenzofuryl phosphonates with excellent enantioselectivities (up to >99%). The origin of enantio- and diastereoselectivity is induced by using a chiral bifunctional organocatalyst. Further, functionalization to highly enantioselective 3-substituted phthalides has also been demonstrated.
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Affiliation(s)
- Gurupada Hazra
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road , Bhauri , Bhopal 462066 , India
| | - Shiv Pratap
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road , Bhauri , Bhopal 462066 , India
| | - Prasanta Ghorai
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road , Bhauri , Bhopal 462066 , India
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24
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Roy TK, Parhi B, Ghorai P. Cinchonamine Squaramide Catalyzed Asymmetric aza-Michael Reaction: Dihydroisoquinolines and Tetrahydropyridines. Angew Chem Int Ed Engl 2018; 57:9397-9401. [DOI: 10.1002/anie.201805020] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Indexed: 12/26/2022]
Affiliation(s)
- Tarun Kumar Roy
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road Bhauri Bhopal- 462066 India
| | - Biswajit Parhi
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road Bhauri Bhopal- 462066 India
| | - Prasanta Ghorai
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road Bhauri Bhopal- 462066 India
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25
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Roy TK, Parhi B, Ghorai P. Cinchonamine Squaramide Catalyzed Asymmetric aza-Michael Reaction: Dihydroisoquinolines and Tetrahydropyridines. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Tarun Kumar Roy
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road Bhauri Bhopal- 462066 India
| | - Biswajit Parhi
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road Bhauri Bhopal- 462066 India
| | - Prasanta Ghorai
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road Bhauri Bhopal- 462066 India
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26
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Ding YL, Li SN, Cheng Y. Selective Synthesis of Multifunctionalized 2,3-Dihydroinden-1-ones and 1,3-Dihydroisobenzofurans from the Reaction of o-Alkynylbenzaldehydes with Imines Steered by N-Heterocyclic Carbene/Copper(II) and N-Heterocyclic Carbene/Base Cascade Catalysis. J Org Chem 2018; 83:8971-8983. [DOI: 10.1021/acs.joc.8b01163] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ya-Li Ding
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Shi-Ning Li
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Ying Cheng
- College of Chemistry, Beijing Normal University, Beijing 100875, China
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27
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Maity S, Sar S, Ghorai P. Primary Aminothiourea-Catalyzed Enantioselective Synthesis of Rauhut-Currier Adducts of 3-Arylcyclohexenone with a Tethered Enone on the Aryl Moiety at the Ortho-Position. Org Lett 2018; 20:1707-1711. [PMID: 29558154 DOI: 10.1021/acs.orglett.7b03959] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An enantioselective synthesis of Rauhut-Currier (RC) adducts from 3-aryl cyclohexenone with a tethered enone moiety at the ortho-position on the aryl group is accomplished. This method provides a wide range of valuable synthetic building blocks having a unique [6-5-6] all-carbon-fused tricyclic skeleton. A primary amine-containing thiourea, a bifunctional organocatalyst, was found to be an efficient catalyst for this transformation. The primary amine counterpart of the catalyst possibly activates the aliphatic enone via dienamine formation (HOMO activation), whereas the thiourea counterpart activates the tethered enone (LUMO activation). Considering the difficulty in achieving an RC reaction of β,β-disubstituted (alkyl and aryl) enones, this method would be significantly rewarding.
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Affiliation(s)
- Sanjay Maity
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road , Bhauri, Bhopal - 462066 , India
| | - Suman Sar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road , Bhauri, Bhopal - 462066 , India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road , Bhauri, Bhopal - 462066 , India
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28
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Nath U, Chowdhury D, Pan SC. Nonenzymatic Dynamic Kinetic Resolution of in situ
Generated Hemithioacetals: Access to 1,3-Disubstituted Phthalans. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701518] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Utpal Nath
- Department of Chemistry; Indian Institute of Technology Guwahati; Assam India 781039, Fax: (+91)-361-258-2349; phone: (+91)-361-258-3304
| | - Deepan Chowdhury
- Department of Chemistry; Indian Institute of Technology Guwahati; Assam India 781039, Fax: (+91)-361-258-2349; phone: (+91)-361-258-3304
| | - Subhas Chandra Pan
- Department of Chemistry; Indian Institute of Technology Guwahati; Assam India 781039, Fax: (+91)-361-258-2349; phone: (+91)-361-258-3304
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29
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Maity S, Saha M, Hazra G, Ghorai P. Switchable Chemoselectivity for Organocatalytic, Asymmetric Malononitrile Addition to ortho-Formyl Chalcones. Org Lett 2017; 19:5872-5875. [DOI: 10.1021/acs.orglett.7b02862] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sanjay Maity
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, India
| | - Mithu Saha
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, India
| | - Gurupada Hazra
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, India
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30
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Yang X, Pang S, Cheng F, Zhang Y, Lin YW, Yuan Q, Zhang FL, Huang YY. Enantioselective Synthesis of 1,3-Disubstituted 1,3-Dihydroisobenzofurans via a Cascade Allylboration/Oxo-Michael Reaction of o-Formyl Chalcones Catalyzed by a Chiral Phosphoric Acid. J Org Chem 2017; 82:10388-10397. [DOI: 10.1021/acs.joc.7b01856] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xing Yang
- Department of Chemistry,
School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Shuai Pang
- Department of Chemistry,
School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Feng Cheng
- Department of Chemistry,
School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Yue Zhang
- Department of Chemistry,
School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Ya-Wei Lin
- Department of Chemistry,
School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Quan Yuan
- Department of Chemistry,
School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Fang-Lin Zhang
- Department of Chemistry,
School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
| | - Yi-Yong Huang
- Department of Chemistry,
School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, P.R. China
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31
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Midya A, Maity S, Ghorai P. Dynamic Kinetic Spiroketalization/Oxa-Michael Addition Cascade of Alkoxyboronates and Peroxyacetals: Enantio- and Diastereoselective Synthesis of Benzannulated Spiroketals. Chemistry 2017. [DOI: 10.1002/chem.201701291] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Abhisek Midya
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal 462066 India
| | - Sanjay Maity
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal 462066 India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal 462066 India
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32
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Hazra G, Maity S, Bhowmick S, Ghorai P. Organocatalytic, enantioselective synthesis of benzoxaboroles via Wittig/oxa-Michael reaction Cascade of α-formyl boronic acids. Chem Sci 2017; 8:3026-3030. [PMID: 28451370 PMCID: PMC5380879 DOI: 10.1039/c6sc04522g] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 01/28/2017] [Indexed: 01/04/2023] Open
Abstract
An unprecedented enantioselective synthesis of 3-substituted benzoxaboroles has been developed. An in situ generated ortho-boronic acid containing chalcone provides the chiral benzoxaboroles via an asymmetric oxa-Michael addition of hydroxyl group attached to the boronic acid triggered by the cinchona alkaloid based chiral amino-squaramide catalysts. In general, good yields with good to excellent enantioselectivities (up to 99%) were obtained. The resulting benzoxaboroles were converted to the corresponding chiral β-hydroxy ketones without affecting the enantioselectivity.
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Affiliation(s)
- Gurupada Hazra
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road, Bhauri , Bhopal-462066 , India .
| | - Sanjay Maity
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road, Bhauri , Bhopal-462066 , India .
| | - Sudipto Bhowmick
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road, Bhauri , Bhopal-462066 , India .
| | - Prasanta Ghorai
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road, Bhauri , Bhopal-462066 , India .
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33
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Lee S, Kaib PSJ, List B. Asymmetric Catalysis via Cyclic, Aliphatic Oxocarbenium Ions. J Am Chem Soc 2017; 139:2156-2159. [PMID: 28169541 DOI: 10.1021/jacs.6b11993] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A direct enantioselective synthesis of substituted oxygen heterocycles from lactol acetates and enolsilanes has been realized using a highly reactive and confined imidodiphosphorimidate (IDPi) catalyst. Various chiral oxygen heterocycles, including tetrahydrofurans, tetrahydropyrans, oxepanes, chromans, and dihydrobenzofurans, were obtained in excellent enantioselectivities by reacting the corresponding lactol acetates with diverse enol silanes. Mechanistic studies suggest the reaction to proceed via a nonstabilized, aliphatic, cyclic oxocarbenium ion intermediate paired with the confined chiral counteranion.
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Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Philip S J Kaib
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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34
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Yamamoto Y, Nogi K, Yorimitsu H, Osuka A. Base-Free Palladium-Catalyzed Hydrodechlorination of Aryl Chlorides with Pinacol Borane. ChemistrySelect 2017. [DOI: 10.1002/slct.201700189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yutaro Yamamoto
- Department of Chemistry; Graduate School of Science; Kyoto University, Sakyo-ku; Kyoto 606-8502 Japan
| | - Keisuke Nogi
- Department of Chemistry; Graduate School of Science; Kyoto University, Sakyo-ku; Kyoto 606-8502 Japan
| | - Hideki Yorimitsu
- Department of Chemistry; Graduate School of Science; Kyoto University, Sakyo-ku; Kyoto 606-8502 Japan
| | - Atsuhiro Osuka
- Department of Chemistry; Graduate School of Science; Kyoto University, Sakyo-ku; Kyoto 606-8502 Japan
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35
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Si CM, Liu YW, Mao ZY, Han P, Du ZT, Wei BG. Asymmetric synthesis of epohelmins A, B and 3-epi ent-epohelmin A. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.10.047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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36
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Reddy RR, Gudup SS, Ghorai P. Organocatalytic, Enantioselective Synthesis of Cyclohexadienone Containing Hindered Spirocyclic Ethers through an Oxidative Dearomatization/Oxa-Michael Addition Sequence. Angew Chem Int Ed Engl 2016; 55:15115-15119. [DOI: 10.1002/anie.201607039] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 08/24/2016] [Indexed: 12/21/2022]
Affiliation(s)
- Reddy Rajasekhar Reddy
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Satish Sonbarao Gudup
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Prasanta Ghorai
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
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37
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Reddy RR, Gudup SS, Ghorai P. Organocatalytic, Enantioselective Synthesis of Cyclohexadienone Containing Hindered Spirocyclic Ethers through an Oxidative Dearomatization/Oxa-Michael Addition Sequence. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Reddy Rajasekhar Reddy
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Satish Sonbarao Gudup
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Prasanta Ghorai
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
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38
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Parhi B, Maity S, Ghorai P. Catalytic Asymmetric Conjugate Addition of Carboxylic Acids via Oxa-Michael Reaction of Peroxy Hemiacetals followed by Kornblum DeLaMare Fragmentation. Org Lett 2016; 18:5220-5223. [DOI: 10.1021/acs.orglett.6b02463] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Biswajit Parhi
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass
Road, Bhauri, Bhopal 462066, India
| | - Sanjay Maity
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass
Road, Bhauri, Bhopal 462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass
Road, Bhauri, Bhopal 462066, India
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39
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Parhi B, Gurjar J, Pramanik S, Midya A, Ghorai P. Organocatalytic Enantioselective Intramolecular Oxa-Michael Reaction of Enols: Synthesis of Chiral Isochromenes. J Org Chem 2016; 81:4654-63. [DOI: 10.1021/acs.joc.6b00565] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Biswajit Parhi
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462066, India
| | - Jitendra Gurjar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462066, India
| | - Suman Pramanik
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462066, India
| | - Abhisek Midya
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462066, India
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40
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Irudayanathan FM, Raja GCE, Kim HS, Na K, Lee S. Copper-catalyzed Decarboxylative Hydroboration: Synthesis of Vinyl Boronic Esters. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10706] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | | | - Han-Sung Kim
- Department of Chemistry; Chonnam National University; Gwangju 61186 Republic of Korea
| | - Kyungsu Na
- Department of Chemistry; Chonnam National University; Gwangju 61186 Republic of Korea
| | - Sunwoo Lee
- Department of Chemistry; Chonnam National University; Gwangju 61186 Republic of Korea
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41
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Han X, Zhou HB, Dong C. Applications of Chiral Squaramides: From Asymmetric Organocatalysis to Biologically Active Compounds. CHEM REC 2016; 16:897-906. [DOI: 10.1002/tcr.201500266] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Xin Han
- State Key Laboratory of Virology; Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education Wuhan University School of Pharmaceutical Sciences; Wuhan 430071 P. R. China
| | - Hai-Bing Zhou
- State Key Laboratory of Virology; Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education Wuhan University School of Pharmaceutical Sciences; Wuhan 430071 P. R. China
| | - Chune Dong
- State Key Laboratory of Virology; Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education Wuhan University School of Pharmaceutical Sciences; Wuhan 430071 P. R. China
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences; Shanghai 200032 P. R. China
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42
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Maity S, Parhi B, Ghorai P. Enantio- and Diastereoselective Synthesis ofexo-Peroxyacetals: An Organocatalyzed Peroxyhemiacetalization/oxa-Michael Addition Cascade. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511165] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Sanjay Maity
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Biswajit Parhi
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Prasanta Ghorai
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
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43
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Maity S, Parhi B, Ghorai P. Enantio- and Diastereoselective Synthesis ofexo-Peroxyacetals: An Organocatalyzed Peroxyhemiacetalization/oxa-Michael Addition Cascade. Angew Chem Int Ed Engl 2016; 55:7723-7. [DOI: 10.1002/anie.201511165] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/04/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Sanjay Maity
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Biswajit Parhi
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Prasanta Ghorai
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
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44
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Wang ZH, Wu ZJ, Yue DF, You Y, Xu XY, Zhang XM, Yuan WC. Enantioselective synthesis of chiral α,β-unsaturated γ-substituted butyrolactams by organocatalyzed direct asymmetric vinylogous Michael addition of α,β-unsaturated γ-butyrolactam to 2-enoylpyridines. Org Biomol Chem 2016; 14:6568-76. [DOI: 10.1039/c6ob01191h] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Approach providing a series of optically active α,β-unsaturated γ-substituted butyrolactams in high yields with excellent diastereo- and enantioselectivities.
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Affiliation(s)
- Zhen-Hua Wang
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Zhi-Jun Wu
- Chengdu Institute of Biology
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Deng-Feng Yue
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Yong You
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Xiao-Ying Xu
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Xiao-Mei Zhang
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Wei-Cheng Yuan
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
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46
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Raveendra B, Maity S, Das BG, Ghorai P. Organocatalytic, Enantioselective Synthesis of 1- and 3-Substituted Isochromans via Intramolecular Oxa-Michael Reaction of Alkoxyboronate: Synthesis of (+)-Sonepiprazole. J Org Chem 2015; 80:7008-18. [PMID: 26102523 DOI: 10.1021/acs.joc.5b00719] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The enantioselective oxa-Michael reaction of alkoxyboronate strategy was demonstrated to provide a new and practical route to enantioriched 1- and 3-substituted isochromans using a chiral bifunctional organocatalyst. Furthermore, this methodology was extended to the enantioselective synthesis of (+)-sonepiprazole, a dopamine receptor antagonist.
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Affiliation(s)
- Barnala Raveendra
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore By-pass Road, Bhauri, Bhopal-462066, India
| | - Sanjay Maity
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore By-pass Road, Bhauri, Bhopal-462066, India
| | - Braja Gopal Das
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore By-pass Road, Bhauri, Bhopal-462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore By-pass Road, Bhauri, Bhopal-462066, India
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47
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Srinivas HD, Maity P, Yap GPA, Watson MP. Enantioselective copper-catalyzed alkynylation of benzopyranyl oxocarbenium ions. J Org Chem 2015; 80:4003-16. [PMID: 25847687 DOI: 10.1021/acs.joc.5b00364] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have developed highly enantioselective, copper-catalyzed alkynylations of benzopyranyl acetals. By using a copper(I) catalyst equipped with a chiral bis(oxazoline) ligand, high yields and enantioselectivities are achieved in the alkynylation of widely available, racemic isochroman and chromene acetals to deliver α-chiral oxygen heterocycles. This method demonstrates that chiral organometallic nucleophiles can be successfully used in enantioselective additions to oxocarbenium ions.
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Affiliation(s)
- Harathi D Srinivas
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Prantik Maity
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Glenn P A Yap
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Mary P Watson
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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Ghosh D, Gupta N, Abdi SHR, Nandi S, Khan NUH, Kureshy RI, Bajaj HC. Organocatalyzed Enantioselective Allylation of Isatins by Using a Chiral Amino Alcohol Derived Squaramide as Catalyst. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500155] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ghosh M, Singha R, Dhara S, Ray JK. Synthesis of 4,5,6-trisubstituted-1,3-dihydroisobenzofurans by virtue of palladium-catalyzed domino carbopalladation of bromoenynes and internal alkynes. RSC Adv 2015. [DOI: 10.1039/c5ra16546f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
An efficient hetero-annulation protocol has been developed for the construction of 4,5,6-trisubstituted-1,3-dihydroisobenzofuransviapalladium-catalyzed domino carbopalladation of bromoenynes and internal alkynes.
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Affiliation(s)
- Munmun Ghosh
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721302
- India
| | - Raju Singha
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721302
- India
| | - Shubhendu Dhara
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721302
- India
| | - Jayanta K. Ray
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721302
- India
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