2-(3-Cyclopropoxy-4-difluoromethoxyphenyl)-3-cyclopropyl-1,5-bis(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one → 2-(3-Cyclopropoxy-4-difluoromethoxyphenyl)-3-cyclopropyl-5-(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one

Participants

Reaction Steps

Reaction and post treatment were carried out in the same manner as in Example 4-(b) except for using 2.72 g (containing an amount corresponding to 3.88 mmol) of 2-(3-cyclopropoxy-4-difluoromethoxyphenyl)-3-cyclopropyl-1,5-bis(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one obtained in Example 14-(a) in place of 2-(3-cyclopropoxy-4-difluoromethoxyphenyl)-3-methyl-1,5-bis(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]-pyridazin-4-one, whereby 3.95 g of the title compound was obtained as a white solid. (Yield: 93%)

Provenance & Evidence