(5aS)-5a-(4-methoxyphenyl)-2-methyl-6-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-1-{[2-(trimethylsilyl)ethoxy]methyl}-5a,6,7,8-tetrahydro-5H-imidazo[1,2-a]imidazo[4',5':4,5]pyrrolo[1,2-d]pyrazin-10(1H)-one 、 (5aS)-5a-(4-methoxyphenyl)-6-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-3-{[2-(trimethylsilyl)ethoxy]methyl}-5a,6,7,8-tetrahydro-5H-imidazo[1,2-a]imidazo[4',5':4,5]pyrrolo[1,2-d]pyrazin-10(3H)-one 、 、 、
三氟乙酸 在
5a-(4-methoxyphenyl)-2-methyl-6-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-5a,6,7,8-tetrahydro-5H-imidazo[1,2-a]imidazo[4',5':4,5]pyrrolo[1,2-d]-pyrazin-10(1H)-one 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以to yield either 5a-(4-methoxyphenyl)-2-methyl-6-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-5a,6,7,8-tetrahydro-5H-imidazo[1,2-a]imidazo[4′,5′:4,5]pyrrolo[1,2-d]pyrazin-10(1H)-one (2) or its regioisomer 5a-(4-methoxyphenyl)-2-methyl-6-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-5a,6,7,8-tetrahydro-5H-imidazo[1,2-a]imidazo[4′,5′:4,5]pyrrolo[1,2-d]pyrazin-10(3H)-one (8.5 mg, 40% yield)的产率得到5a-(4-methoxyphenyl)-2-methyl-6-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-5a,6,7,8-tetrahydro-5H-imidazo[1,2-a]imidazo[4',5':4,5]pyrrolo[1,2-d]-pyrazin-10(1H)-one