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
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
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.