3,6-Dimethoxy-phenanthro4,5—bcdfuran und (7R)-7-Methoxyneopin-methin

摘要

Reaction of “9.10-Dehydro-indolinocodeine-methoperchlorate” (4) with sodium methoxide solution yields thedes-base (7R)-7-methoxyneopine-methine (5 a). Its structure was established on the basis of spectroscopic methods.Hofmanndegradation of5 aaffords the so far unknown 3.6-dimethoxy-phenanthro4.5—bcdfuran