A novel palladium-mediated coupling approach to 2,3-disubstituted benzo[b]thiophenes and its application to the synthesis of tubulin binding agents

Bernard L. Flynn; Pascal Verdier-Pinard; Ernest Hamel

doi:10.1021/ol0067179

A novel palladium-mediated coupling approach to 2,3-disubstituted benzo[b]thiophenes and its application to the synthesis of tubulin binding agents

Bernard L. Flynn, Pascal Verdier-Pinard, Ernest Hamel

Research output: Contribution to journal › Article › Research › peer-review

255 Citations (Scopus)

Abstract

Flexible, convergent access to 2,3-disubstituted benzo[b]thiophenes has been developed. The most concise approach involves sequential coupling of o-bromoiodobenzenes with benzylmercaptan and zinc acetylides to give benzyl o-ethynylpnenyl sulfides which react with iodine to give 3-iodobenzo[b]thiophenes in a 5-endo-dig iodocyclization. These iodides can be further elaborated using palladium-mediated coupling and/or metalation techniques. This method has been applied to the synthesis of some novel tubulin binding agents.

Original language	English
Pages (from-to)	651-653
Number of pages	3
Journal	Organic Letters
Volume	3
Issue number	5
DOIs	https://doi.org/10.1021/ol0067179
Publication status	Published - 8 Mar 2001
Externally published	Yes

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AB - Flexible, convergent access to 2,3-disubstituted benzo[b]thiophenes has been developed. The most concise approach involves sequential coupling of o-bromoiodobenzenes with benzylmercaptan and zinc acetylides to give benzyl o-ethynylpnenyl sulfides which react with iodine to give 3-iodobenzo[b]thiophenes in a 5-endo-dig iodocyclization. These iodides can be further elaborated using palladium-mediated coupling and/or metalation techniques. This method has been applied to the synthesis of some novel tubulin binding agents.

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A novel palladium-mediated coupling approach to 2,3-disubstituted benzo[b]thiophenes and its application to the synthesis of tubulin binding agents

Abstract

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