Synthetic studies on virantmycin. 2. Total synthesis of unnatural (+)-virantmycin and determination of its absolute stereochemistry
作者:Yoshiki Morimoto、Haruhisa Shirahama
DOI:10.1016/0040-4020(96)00608-4
日期:1996.8
enantioselective total synthesis of (+)-virantmycin (1) has been achieved by means of the Sharpless asymmetric epoxidation of allylic alcohol 27 followed by an intramolecular epoxide opening of the exo epoxy alcohol 32 which was derived from the endo epoxy alcohol 28. The synthesis of (+)-1 has established that the absolute configuration of the natural product (−)-1 is shown to be 2R, 3R at the two chiral
(+)-virantmycin(1)的对映选择性全合成是通过烯丙基醇27的Sharpless不对称环氧化,随后是由内环氧醇28衍生的exo环氧醇32的分子内环氧化物开口而实现的。(+)- 1的合成已确定天然产物(-)- 1的绝对构型在两个手性中心显示为2 R,3R。此外,还检查了维霉素类似物的抗病毒活性对流感病毒。