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Ravi Kumar G, Rajashekhar Reddy M, Yogananda Chary D, Banik S, Sridhar B, Subba Reddy B. Cooperative catalytic Prins cyclization for the construction of azaspiro[5.5]undec-2-ene frameworks. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Bandi V, Kavala V, Konala A, Hsu CH, Villuri BK, Reddy SR, Lin L, Kuo CW, Yao CF. Synthesis of Polysubstituted Cyclopentene and Cyclopenta[ b]carbazole Analogues from Unsymmetrical 4-Arylidene-3,6-diarylhex-2-en-5-ynal and Indole Derivatives via an Iodine Mediated Electrocyclization Reaction. J Org Chem 2019; 84:3036-3044. [PMID: 30359006 DOI: 10.1021/acs.joc.8b02168] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An efficient method for the synthesis of polysubstituted cyclopentene and cyclopenta[ b]carbazole derivatives through the iodine-promoted electrocyclization of substituted indoles and 4-arylidene-3,6-diarylhex-2-en-5-ynal derivatives is reported. Polysubstituted cyclopentene derivatives were produced through 4π electrocyclization reactions with indole, 7-methylindole, and 5-bromoindole as coupling partners, whereas cyclopenta[ b]carbazole derivatives were produced via 6π electrocyclization in the case of methoxy (-OMe)-substituted indoles. The methods reported herein diastereo- and regioselectively proceed under straightforward and mild conditions.
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Affiliation(s)
- Vijayalakshmi Bandi
- Department of Chemistry , National Taiwan Normal University , 88, Sec 4, Ting-Chow Road , Taipei 116 , Taiwan R.O.C
| | - Veerababurao Kavala
- Department of Chemistry , National Taiwan Normal University , 88, Sec 4, Ting-Chow Road , Taipei 116 , Taiwan R.O.C
| | - Ashok Konala
- Department of Chemistry , National Taiwan Normal University , 88, Sec 4, Ting-Chow Road , Taipei 116 , Taiwan R.O.C
| | - Che-Hao Hsu
- Department of Chemistry , National Taiwan Normal University , 88, Sec 4, Ting-Chow Road , Taipei 116 , Taiwan R.O.C
| | - Bharath Kumar Villuri
- Department of Chemistry , National Taiwan Normal University , 88, Sec 4, Ting-Chow Road , Taipei 116 , Taiwan R.O.C
| | - Sabbasani Rajasekhara Reddy
- Department of Chemistry , National Taiwan Normal University , 88, Sec 4, Ting-Chow Road , Taipei 116 , Taiwan R.O.C.,Department of Chemistry, School of Advanced Sciences , Vellore Institute of Technology (VIT) , Vellore 632014 , India
| | - LiChun Lin
- Department of Chemistry , National Taiwan Normal University , 88, Sec 4, Ting-Chow Road , Taipei 116 , Taiwan R.O.C
| | - Chun-Wei Kuo
- Department of Chemistry , National Taiwan Normal University , 88, Sec 4, Ting-Chow Road , Taipei 116 , Taiwan R.O.C
| | - Ching-Fa Yao
- Department of Chemistry , National Taiwan Normal University , 88, Sec 4, Ting-Chow Road , Taipei 116 , Taiwan R.O.C
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