(5R,8S,10R,11S)-5,8-dihydro-10,11-dihydroxy-2-phenyl-5,8-etheno-1H-[1,2,4]triazolo[1,2-a]pyridazine-1,3(2H)-dione 、
乙酸酐 在
吡啶 作用下,
以90%的产率得到(5R,8S,10R,11S)-10,11-bis(acetyloxy)-5,8-dihydro-2-phenyl-5,8-etheno-1H-[1,2,4]triazolo[1,2-a]pyridazine-1,3(2H)-dione