Ethylene Glycol → HCID 66602968, compound

Participants

Reaction Conditions

Reaction Steps

To 46 ml of ethylene glycol solution containing 5.01 g (8.44 mmol) of ethyl 1-benzyloxymethyl-5-(3-cyclopropoxy-4-difluoromethoxyphenyl)-4-(2-fluorobenzyl)-2-formyl-1H-pyrrol-3-carboxylate obtained in the following Reference example 36-(f) was added 2.13 ml (42.5 mmol) of hydrazine monohydrate at 60° C., and then the mixture was stirred at 130° C. for 8.5 hours. After completion of the reaction, water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer after separation was washed successively with water and then with a saturated aqueous solution of sodium chloride, dried over anhydrous magnesium sulfate and then concentrated under reduced pressure. The obtained residue was applied to silica gel column chromatography (Eluent; hexane:ethyl acetate=1:1→1:2 (V/V)), and the fractions containing the desired compound were concentrated under reduced pressure to obtain 4.28 g of the title compound as a white solid. (Yield: 90%)

Provenance & Evidence