Chloroformate ester-induced reductive 1,2-bond cleavage of some 1,2,3,4-tetrahydro-β-carboline derivatives
作者:Martin J. Calverley
DOI:10.1039/c39810001209
日期:——
Treatment with a chloroformate ester at –70 °C and subsequent reaction with NaBH3CN converts 1,2,5,6,11,11b-hexahydro-3H-indolo[3,2-g]indolizine and derivatives of 1,2,3,4,6,7,12,12b-octahydroindolo[2,3-a]-quinolizine cleanly into the corresponding C/D ring-cleaved urethane derivatives; when the order of addition of reagents is reversed in experiments performed at 0 °C, formation of stable substrate–cyanoborane
在–70°C下用氯甲酸酯处理,然后与NaBH 3 CN反应,可转化为1,2,5,6,11,11b-六氢-3 H-吲哚并[3,2- g ]吲哚并嗪和1,2的衍生物,3,4,6,7,12,12b-八氢吲哚并[2,3- a ]-喹啉嗪干净地转化为相应的C / D环裂解的氨基甲酸酯衍生物; 当在0°C下进行的实验中颠倒试剂的添加顺序时,稳定的底物-氰基硼烷加合物的形成会与该反应竞争。