Pentaoxygenated berbines: Total synthesis of (±) O-methylcapauridine and (±) 0, 0'-dimethylstephabinamine

摘要

A convenient total synthesis of pentaoxygenated berbine alkaloids; (2)-0-methylcapauridine(lSa), (+) 0,O'- dimerhylstephabinamine(15c) and a berbine(15b) is described from 3,4,5-trimethoxy-6-phenylethylamine( mescaline 12). Condensation of mescaline (12)