A convergent strategy towards taxol. A facile enantioselective entry into a fully functionalized ring A system
作者:K. C. Nicolaou、C.-K. Hwang、E. J. Soresen、C. F. Clairborne
DOI:10.1039/c39920001117
日期:——
Key intermediates 10–12 related to the taxol ring A system have been synthesized in enantiomerically pure form by a short and efficient route featuring a Diels–Alder reaction and a Corey oxazaborolidine reduction.
通过以 Diels-Alder 反应和 Corey oxazaborolidine 还原为特征的简短高效路线,合成了对映体纯度为 10-12 的与紫杉醇环 A 系统相关的关键中间体。
Synthesis of ABCtaxoid ring systems via a convergent strategy
作者:K. C. Nicolaou、Zhen Yang、Erik J. Sorensen、Masahisa Nakada
DOI:10.1039/c39930001024
日期:——
Intermediates 4 and 5have been coupled via a Shapiro reaction to afford compound 6 which has been further elaborated to the ABCtaxcid systems 11and 12via a McMurry pinacol cyclization to 11followed by oxidation to12.
Total Synthesis of taxol. 2. Construction of A and C ring intermediates and initial attempts to construct the ABC ring system
作者:K. C. Nicolaou、J.-J. Liu、Z. Yang、H. Ueno、E. J. Sorensen、C. F. Claiborne、R. K. Guy、C.-K. Hwang、M. Nakada、P. G. Nantermet
DOI:10.1021/ja00107a007
日期:1995.1
A method for the formation of Taxol's ABC ring system has been developed. General methods for the synthesis of versatile synthons for Taxol's A ring (8) and C ring (55) are presented. A model study using a simplified C ring synthon (17) confirmed the viability of the sequential Shapiro-McMurry strategy for formation of Taxol's B ring. Careful exploration of the chemistry of various A-B ring conjugates allowed the development of a successful method for formation of the B ring in a more functionalized system.
US5274137A
申请人:——
公开号:US5274137A
公开(公告)日:1993-12-28
A concise enantioselective synthesis of a fully oxygen substituted ring A taxol precursor
作者:Olivier Roy、Gerald Pattenden、David C. Pryde、Claire Wilson
DOI:10.1016/s0040-4020(03)00699-9
日期:2003.6
A concise synthesis of the oxygen substituted ring A compound 2 found in Taxol®1a and Taxotere®1b starting from 2,2-dimethylcyclohexane-1,3-dione and proceeding via the key intermediates 8 and 11, is described. The absolute configuration of 2 was established from an X-ray crystal structure determination of a 4-bromophenylbenzoate derivative, viz. 15.