Convenient Synthesis of Cyclohexa[a]pyrrolo[2,1-b][3]benzazepine, a Cephalotaxus Alkaloid Analogue
作者:Hitoshi Tanaka、Mitsunobu Doi、Hiroshi Shimizu、Hideo Etoh
DOI:10.3987/com-99-8643
日期:——
Irradiation of N-(3-hydroxy-4-methoxyphenethyl) -3-(2-iodo-5-methoxyphenyl)propionamide (11) in methanol in the presence of sodium hydroxide furnished 3-hydroxy-2,12-dimethoxy-6,7,9,10-tetrahydrodibenz[d3]azecin-8(5H)-one (14) which was successfully led to cephalotaxine analogue (17) bearing pyrrolo[2,1-b][3]benzazepine skeleton by reduction with borane followed by Birch reduction and subsequent acidic treatment. The structure of 17 was established by means of X-Ray crystallography.