Synthesis of N-Methylphenanthridinone Derivatives Fused with a Silacyclohexane Ring by Radical Reaction Using Tributyltin Hydride
作者:Osamu Hoshino、Yuya Hoshino
DOI:10.3987/com-05-s(k)64
日期:——
Radical reaction of (N-methyl-7-bromo-2,2-dimethyl-2-silatetralin-6-ylamino)veratramide (8a) and -piperonamides (8b) in boiling benzene using tributyltin hydride and AIBN gave two kinds of N-methylphenanthridinone derivatives (15 and 16), which were cyclized at 6-and 2-positions of aroylic acid moiety. On the other hand, similar reaction of N-methyl-N-(2-bromoveratryl and 2-bromopiperonyl)-2,2-dim
(N-methyl-7-bromo-2,2-dimethyl-2-silatetralin-6-ylamino)veratraamide (8a) 和 -piperonamides (8b) 在沸腾的苯中使用氢化三丁基锡和 AIBN 进行自由基反应,得到两种 N-甲基菲啶酮衍生物(15 和 16),它们在芳酸部分的 6 位和 2 位环化。另一方面,N-甲基-N-(2-溴代甲基和2-溴哌啶基)-2,2-二甲基-2-silatetralin-6-carboxamides (14) 的类似反应分别产生 N-甲基菲啶酮衍生物 (17)唯一的产物,其中环化发生在 2-silatetralin 部分的 5 位。