Total Synthesis of taxol. 2. Construction of A and C ring intermediates and initial attempts to construct the ABC ring system
摘要:
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.
Total Synthesis of taxol. 2. Construction of A and C ring intermediates and initial attempts to construct the ABC ring system
摘要:
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.
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.