1-cyclopropyl-5-[1-((4R,5S)-2,2-dimethyl-5-phenyl[1,3]dioxolan-4-yl)methanoyl]-2-methyl-1,5,6,7-tetrahydro-benzoimidazol-4-one 在
manganese dioxide crude product 、
methanol-dichloromethane 作用下,
以
1,4-二氧六环 为溶剂,
反应 5.0h,
以to give 0.84 g (2.14 mmol/84%) of the title product as a colourless solid with a melting point of 153° C. (dichloromethane/methanol)的产率得到1-cyclopropyl-4-hydroxy-5-[1-((4R,5S)-2,2-dimethyl-5-phenyl-[1,3]dioxolan-4-yl)-methanoyl]-2-methyl-1H-benzoimidazole