Physiologically active marine natural products from Porifera. VIII. Agelasidines. Novel hypotaurocyamine derivatives from the Okinawan sea sponge Agelas nakamurai Hoshino
Herein, we report the first general palladium-catalyzed sulfonylation of vinyl cyclic carbonates with sodium sulfinates. A series of enantiomerically enriched tertiary allylic sulfones were synthesized in good yields with excellent enantiomeric ratios. Both aliphatic- and aryl-substituted vinyl cyclic carbonates are suitable reactants with excellent results. This reaction features broad substrates scope
Enantioselective Synthesis of (+)-Agelasidine A Using Thio-Claisen Rearrangement
作者:Yoshiyasu Ichikawa、Rika Ochi、Toshiya Masuda
DOI:10.1055/s-0040-1719933
日期:2022.10
Enantioselective synthesis of the marine natural product (+)-agelasidine A has been achieved by taking advantage of [1,3]-chirality transfer from enantiomerically enriched α-silyl farnesol through a key thio-Claisen rearrangement. The optical rotation of the hydrochloride salt of the synthetic substance confirmed that natural (+)-agelasidine A has the S-configuration at its C-10 stereogenic center
海洋天然产物 (+)-agelasidine A 的对映选择性合成是通过利用对映体富集的 α-甲硅烷基法呢醇通过关键的硫代-克莱森重排实现的 [1,3]-手性转移来实现的。合成物质的盐酸盐的旋光性证实天然(+)-阿格拉西定A在其C-10立体中心具有S-构型。