(11Z)-9-ethoxy-8-isobutyl-11-(2-methylpropylidene)-8,11-dihydro-6H-oxepino[2,3-d]pyrazino[1,2-a]pyrimidin-6-one 在
水 、
溶剂黄146 作用下,
反应 1.5h,
生成 (R)-9-ethoxy-8-isobutyl-11-((Z)-2-methylpropylidene)-8,11-dihydro-6H-oxepino[2,3-d]pyrazino[1,2-a]pyrimidin-6-one 、 (8S,11Z)-8-isobutyl-11-(2-methylpropylidene)-10,11-dihydro-6H-oxepino[2,3-d]pyrazino[1,2-a]pyrimidine-6,9(8H)-dione