π-Allyl cation cyclisations initiated by electrocyclic ring-opening of gem-dihalocyclopropanes: application to the first total syntheses of the crinine-type alkaloids maritinamine and epi-maritinamine
作者:Martin G. Banwell、Joanne E. Harvey、Katrina A. Jolliffe
DOI:10.1039/b106369n
日期:——
The racemic modifications of the crinine alkaloids 1 and 2 have been synthesized for the first time and by a pathway that involves silver(I)-promoted electrocyclic ring-opening of the ring-fused gem-dichlorocyclopropane 3 and trapping of the resulting Ï-allyl cation by the tethered carbamate moiety so as to form the pivotal C3a-arylated hexahydroindole 14.
我们首次合成了外消旋变体克利宁生物碱 1 和 2,其合成途径包括银(I)促进环状融合的宝石二氯环丙烷 3 的电环开环,以及氨基甲酸酯分子捕获所产生的Ï-烯丙基阳离子,从而形成关键的 C3a 芳基化六氢吲哚 14。