Total syntheses of epothilones B and d

…, R Kache, KK Vines, YS Zheng, P Bijoy…

Index: Jung, Jae-Chul; Kache, Rajashaker; Vines, Kimberly K.; Zheng, Yan-Song; Bijoy, Panicker; Valluri, Muralikrishna; Avery, Mitchell A. Journal of Organic Chemistry, 2004 , vol. 69, # 26 p. 9269 - 9284

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Citation Number: 47

Abstract

A convergent, total synthesis of epothilones B (2) and D (4) is described. The key steps are Normant coupling to establish the desired (Z)-stereochemistry at C12-C13, Wadsworth- Emmons olefination of methyl ketone 28 with the phosphonate ester 8, diastereoselective aldol condensation of aldehyde 5 with the enolate of keto acid derivatives to form the C6-C7 bond, selective deprotection of acid 52, and macrolactonization.