8β-Substituted dihydrocodeinones having heteroatoms in the side chain
作者:Michael P. Kotick、Joseph O. Polazzi
DOI:10.1002/jhet.5570180535
日期:1981.8
A series of 8β-substituteddihydrocodeinones, having hetero atoms in the sidechain, were prepared. Michael addition of methanol or ethanol to 1 was accomplished under basic conditions, while the nitromethane adduct was prepared by a fluoride ion catalyzed reaction. The 8β-diethylmalonyl adduct 7 was converted in several steps to an 8β-tertiary carbinol analog 12. Alternatively, 8β-vinyldihydrocodeinone