1,7-cyclo-cis :erythrinan-8-one with ceric ammonium nitrate in methanol gave the appreciable yields of the corresponding 11β-methoxy compounds; these were converted into the natural 11-oxygenated erythrinan alkaloid, erythristemine, in high yield.
在
甲醇中用
硝酸铈铵处理顺式-
赤藓醇-8-或1,7-环-顺式:
赤藓醇-8-得到相应的11β-甲氧基化合物,其收率相当可观。它们以高收率被转化为天然的11-氧化的红藻
生物碱,赤藓碱。