Enantioselective synthesis of a putative hexaketide intermediate in the biosynthesis of the squalestatins
作者:Thomas J. Simpson、Robert W. Smith、Susan M. Westaway、Christine L. Willis、Antony D. Buss、Richard J.P. Cannell、Michael J. Dawson、Brian A.M. Rudd
DOI:10.1016/s0040-4039(97)01174-x
日期:1997.7
A convergent synthesis of (3R, 5Z, 8E, 10R)-3-hydroxy-8,10-dimethyl-11-phenylundec-5,8-dienoic acid 4, a putative hexaketide intermediate in the biosynthesis of the squalestatins, is described. A key step in the assembly of the carbon framework is the coupling of alkyne 19 with allylic bromide 13 giving, after further functional group manipulations, the target compound as a single diastereomer. The
(3 R,5 Z,8 E,10 R)-3-羟基-8,10-二甲基-11-苯基十一烷基-5,8-二烯酸4的收敛合成进行说明。碳骨架组装中的关键步骤是炔烃19与烯丙基溴13的偶联,经过进一步的官能团处理后,得到的目标化合物为单一非对映异构体。该方法可以适合于准备相应的(3 S,5 Z,8 E,10 R)异构体以及生物合成研究所需的碳13标记的掺入。