Studies on tetrahydroisoquinolines. XVII. A synthesis of 8-halo-1,2,3,4-tetrahydroisoquinolines.
作者:HIROSHI HARA、OSAMU HOSHINO、BUNSUKE UMEZAWA
DOI:10.1248/cpb.29.51
日期:——
Treatment with conc. hydrochloric acid of p-quinol acetates (1) obtained from 7-hydroxy-1, 2, 3, 4-tetrahydroisoquinolines (4) gave the corresponding 8-chloro-7-hydroxy-1, 2, 3, 4-tetrahydroisoquinolines (5) in good yields. Similarly, by using conc. hydrobromic acid or 38% hydriodic acid, 8-bromo (6)- or 8-iodo-corypalline (7) was obtained.