A 1,3-dipolar cycloaddition of alicyclic methylene iminium ylide to form pyrrolizidine nuclei and its application to synthesis of pyrrolizidine alkaloids.
作者:YOSHIYASU TERAO、NOBUYUKI IMAI、KAZUO ACHIWA、MINORU SEKIYA
DOI:10.1248/cpb.30.3167
日期:——
Efficient synthesis of pyrrolizidines and indolizidines has been achieved by reacting tetracyclic hexahydro-1, 3, 5-triazines with olefinic and acetylenic compounds in the presence of trimethylsilylmethyl trifluoromethanesulfonate and cesium fluoride. This reaction was applied to the synthesis of several pyrrolizidine alkaloids, (±)-trachelanthamidine, (±)-supinidine, and (±)-isoretronecanol.
通过在三甲基硅甲基三氟甲磺酸酯和氟化铯存在下,将四环己烷-1,3,5-三嗪与烯烃和炔烃化合物反应,实现了吡咯并吡嗪和吲哚并吡嗪的高效合成。该反应应用于几种吡咯并吡嗪生物碱的合成,包括(±)-刺桐胺、(±)-苦参碱和(±)-异雷公藤醇。