Improved syntheses of methyl (14E)- and (14Z)-dehydrocrepenynate: key intermediates in plant and fungal polyacetylene biosynthesis
作者:Lizhi Zhu、Robert E Minto
DOI:10.1016/s0040-4039(01)00577-9
日期:2001.6
Efficient syntheses of the (14E)- and (14Z)-isomers of methyl dehydrocrepenynate have been achieved. The key steps involve Pd-catalyzed cross-coupling reactions furnishing the CC double bonds between C14 and C15, followed by Wittig reactions to construct the (Z)-alkene at C9. High overall yields and stereoselectivities were achieved for both isomers.
已经实现了脱氢crepenynate的(14 E)-和(14 Z)异构体的高效合成。关键步骤包括在C14和C15之间提供C CC双键的Pd催化交叉偶联反应,然后进行Wittig反应,以在C9处构建(Z)烯烃。两种异构体均具有较高的总收率和立体选择性。