New Synthetic Route to 10,11-Dihydro-5<i>H</i>-dibenzo[<i>a</i>,<i>d</i>]cyclohepten-5,10-imines through Photoamination of 5-Alkoxy- and 5-Hydroxy-5<i>H</i>-dibenzo[<i>a</i>,<i>d</i>]cycloheptenes Followed by a Transannular Reaction with Acetic Acid
作者:Masahide Yasuda、Tomoko Wakisaka、Ryuji Kojima、Kimiko Tanabe、Kensuke Shima
DOI:10.1246/bcsj.68.3169
日期:1995.11
The photoadditions of ammonia and alkylamines (RNH2) to 5-hydroxy- and 5-alkoxy-5H-dibenzo[a,d]cycloheptene derivatives (2) occurred at the C10–C11 double bond upon the irradiation of 2 with RNH2 in the presence of p-dicyanobenzene. The resulting 5-substituted 10-alkylamino-10,11-dihydro-5H-dibenzo[a,d]cycloheptenes were converted to 5-substituted N-alkyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5,10-imines by a treatment with AcOH.
氨和烷基胺(RNH2)对5-羟基和5-烷氧基-5H-二苯并[a,d]环庚烯衍生物(2)的加成发生在C10-C11双键处,这是在存在对二氰基苯的情况下,通过RNH2对2进行辐照实现的。所得到的5-取代的10-烷基氨基-10,11-二氢-5H-二苯并[a,d]环庚烯通过与AcOH处理,转化为5-取代的N-烷基-10,11-二氢-5H-二苯并[a,d]环庚烯-5,10-亚胺。