Synthesis of indole-4-carboxaldehydes and 4-acetylindole from<i>N</i>-alkyl-5-aminoisoquinolinium salts
作者:Joseph M. Muchowski
DOI:10.1002/jhet.5570370545
日期:2000.9
N-Alkyl-5-aminoisoquinolinium salts (8a-d) are converted into indole-4-carboxaldehydes (1a-c) on heating in a two phase alkyl acetate-water system containing an excess of a 2:1 sodium bisulfite-sodium sulfite mixture. 4-Acetylindole 1e is prepared in the same way from 1-methyl-2-cyanomethylisoquinolinium bromide 8f.
在含有过量的2:1亚硫酸氢钠-亚硫酸钠的两相乙酸烷基酯-水体系中加热时,将N-烷基-5-氨基异喹啉鎓盐(8a-d)转化为吲哚-4-羧醛(1a-c)混合物。由4-甲基-2-氰基甲基异喹啉鎓溴化物8f以相同的方式制备4-乙酰基吲哚1e。