Formic Acid Catalyzed Rearrangement of Thevinols (=4,5-Epoxy-3,6-dimethoxy-α,17-dimethyl-6,14-ethenomorphinan-7-methanols) and Their Vinylogous Analogues: Effects of 5β-Methyl Substitution
作者:Peter Grundt、Fernando Martinez-Bermejo、John W. Lewis、Stephen M. Husbands
DOI:10.1002/hlca.200390185
日期:2003.7
equivalent 14-alkenyl-7,8-dihydrocodeinones undergo further rearrangement (Scheme 1 and Table). Introduction of a 5β-methyl group allows the 18,19-dihydrothevinol precursors to be rearranged to 14-alkenyl-7,8-dihydrocodeinones, but similar manipulation of the vinylogues of these thevinols is generally unable to prevent full rearrangement to 5,14-bridged thebainone derivatives.
在少数情况下,可以通过对乙烯醇进行甲酸处理来获得14个烯基可待因酮(= 14-烯基-7,8-二氢-4,5-环氧-3-甲氧基-17-甲基吗啡喃-6-酮)( = 4,5-环氧-3,6-二甲氧基-α,17-二甲基-6,14-乙炔吗啡喃-7-甲醇),但是在这些条件下,等效的14-烯基-7,8-二氢可待因酮经历进一步的重排(方案1和表)。5介绍β -甲基组允许18,19 dihydrothevinol前体将被重新排列到14链烯基-7,8- dihydrocodeinones,但这些thevinols的vinylogues的类似操作一般不能充分防止重排至5,14桥联的蒂巴因酮衍生物。