摘要:
The synthesis of isoascididemin, a regioisomer of the naturally occurring ascididemin, has been completed in nine steps from 2,5-dimethoxyaniline. The key steps feature a selective palladium(O)-catalyzed cross-coupling reaction of 6-bromo-5,8-dimethoxy-4-[(trifluoromethanesulfonyl)oxy]quinoline with N-(tert-butoxycarbonyl)-2-(trimethylstannyl)aniline promoted by Cu(I) and a hetero-Diels-Alder reaction of a quinoline-5,8-dione with acrolein N,N-dimethylhydrazone.