Manganese triacetate oxidative lactonisation of electron-rich stilbenes possessing catechol and resorcinol substitution (resveratrol analogues)
作者:N.F. Thomas、K.C. Lee、Thomas Paraidathathu、J.F.F. Weber、K. Awang
DOI:10.1016/s0040-4039(02)00484-7
日期:2002.4
Treatment of 3,5-dimethoxy-12-benzyloxystilbene 10a or 3,4-dimethoxy-12-benzyloxystilbene 10b with Mn(OAc)3 in acetic anhydride containing 13% acetic acid produced the lactones 4-(4′-benzyloxyphenyl)-5-(3′,5′-dimethoxyphenyl)-furan-2-one 11a and 4-(4-benzyloxyphenyl)-5-(3′,4′-dimethoxyphenyl)-furan-2-one 13 in yields of 35% as a 3:1 diastereomeric mixture (but as one regioisomer) and 13% as a mixture
在含13%乙酸的乙酸酐中用Mn(OAc)3处理3,5-二甲氧基-12-苄氧基sti 10a或3,4-二甲氧基-12-苄氧基sti 10b产生内酯4-(4'-苄氧基苯基)-5 -(3',5'-二甲氧基苯基)-呋喃-2-酮11a和4-(4-苄氧基苯基)-5-(3',4'-二甲氧基苯基)-呋喃-2-酮13的收率为35% 3:1非对映异构体混合物(但作为一种区域异构体)和13%作为区域异构体混合物(1:1)。