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Ren L, Luo J, Tan L, Tang Q. Titanium-Mediated Domino Cross-Coupling/Cyclodehydration and Aldol-Addition/Cyclocondensation: Concise and Regioselective Synthesis of Polysubstituted and Fused Furans. J Org Chem 2022; 87:3167-3176. [PMID: 35133828 DOI: 10.1021/acs.joc.1c02894] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Titanium enolates, in situ-generated from readily available ketones and titanium tetraisopropoxide, undergo domino cross-coupling/cyclodehydration or domino Aldol-addition/cyclocondensation with α-chloroketones to provide synthetically valuable furan derivatives. The domino process tolerates a variety of cyclic and acyclic ketones and chloroketones, producing polysubstituted furans and bi-, tri-, and tetracyclic fused furans.
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Affiliation(s)
- Lu Ren
- College of Pharmacy, Center for Lab Teaching and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing 400016, PR China
| | - Juan Luo
- College of Pharmacy, Center for Lab Teaching and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing 400016, PR China
| | - Linbo Tan
- College of Pharmacy, Center for Lab Teaching and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing 400016, PR China
| | - Qiang Tang
- College of Pharmacy, Center for Lab Teaching and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing 400016, PR China
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Tu X, Peng H, Deng G. Synthesis of 4H-cyclopenta[c]furan-5(6H)-one derivatives. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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3
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Knoevenagel condensation versus Michael addition reaction in ionic-liquid-catalyzed synthesis of hexahydroquinoline: a SMD–DFT study. Theor Chem Acc 2020. [DOI: 10.1007/s00214-020-2565-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Zhang J, Yang Q, Zhu Y, Wang J, Deng G. Synthesis and Rhodium(II)-Mediated Cascade Cyclopropanation/Rearrangement/Isomerization of Diazo 2,3,5-Trisubstituted Furans: The Construction of Penta-substituted Aromatic Compounds. J Org Chem 2020; 85:2395-2405. [PMID: 31916442 DOI: 10.1021/acs.joc.9b03093] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Ag(I)-catalyzed synthesis of diazo-trisubstituted furans starting from diazo-cumulated allenyl ketones has been investigated. The Rh2(OAc)4-catalyzed reaction of the diazo 2,3,5-trisubstituted furans provided penta-substituted aromatics via cascade intermolecular cyclopropanation/rearrangement/isomerization. The cyclopropanation on the furan ring/rearrangement of cyclopropane moiety has been reported. A reasonable mechanism is proposed.
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Affiliation(s)
- Jianfang Zhang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) , Hunan Normal University , Changsha 410081 , China.,Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province , Hunan Normal University , Changsha 410081 , China
| | - Qin Yang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) , Hunan Normal University , Changsha 410081 , China.,Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province , Hunan Normal University , Changsha 410081 , China
| | - Yang Zhu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) , Hunan Normal University , Changsha 410081 , China.,Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province , Hunan Normal University , Changsha 410081 , China
| | - Jianbo Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS) , Peking University , Beijing 100871 , PR China
| | - Guisheng Deng
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) , Hunan Normal University , Changsha 410081 , China.,Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province , Hunan Normal University , Changsha 410081 , China.,Beijing National Laboratory for Molecular Sciences (BNLMS) , Peking University , Beijing 100871 , PR China
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