作者:Michael P. Kotick、Joseph O. Polazzi
DOI:10.1002/jhet.5570180535
日期:1981.8
A series of 8β-substituted dihydrocodeinones, having hetero atoms in the side chain, 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
制备了一系列在侧链具有杂原子的8β-取代的二氢可待因酮。迈克尔加成甲醇或乙醇中,1是在碱性条件下完成的,而硝基甲烷加合物是由氟离子催化的反应来制备。8β-二乙基丙二酰基加合物7在几个步骤中转化为8β-叔甲醇类似物12。或者,将8β-乙烯基二氢可待因酮13经由二甲基缩酮转化为8β-羟甲基或-乙基化合物,其通过使用三氟化二乙基氨基硫而在侧链中被氟化。