Syntheses of dibenzo(b,f)azonines and dibenzo(b,g)azecines through ring expansion of 1-substituted isoquinolines.
作者:SHINZO KANO、EIJI KOMIYAMA、YOUKO TAKAHAGI、SHIROSHI SHIBUYA
DOI:10.1248/cpb.24.648
日期:——
The reaction of 1-(2-bromo-4, 5-methylenedioxyphenethyl)-1, 2, 3, 4-tetrahydro-6-hydroxy-7-methoxy-2-methylisoquinoline (13) with sodium methylsulfinylmethanide gave the dibenzo [b, g] azecine (14). The 1-benzyl analog possessing a methyl group at the 3-position was transformed to the 6, 13-disubstituted dibenzo [b, f] azonine (33) under the similar conditions. 33 was converted to the corresponding 6, 13-dimethyl derivative (35). Hydrogenolysis of the N-methyl-dibenzo [a, f] quinolizinium iodide (23) over Adams catalyst was also examined to give the dibenzo [b, g] azecine (24).
1-(2-bromo-4, 5-methylenedioxyphenethyl)-1, 2, 3, 4-tetrahydro-6-hydroxy-7-methoxy-2-methylisoquinoline (13) 与甲基亚磺酰甲烷化钠反应生成二苯并[b, g]氮杂喹啉 (14)。在类似的条件下,在 3-位上具有甲基的 1-苄基类似物转化为 6,13-二取代的二苯并[b,f]氮杂喹啉(33)。33 转化为相应的 6,13-二甲基衍生物(35)。还研究了 N-甲基二苯并[a, f]喹嗪碘化物(23)在 Adams 催化剂上的氢解反应,得到二苯并[b, g]氮杂吖嗪(24)。