Methanol → HCID 19030944, compound

Participants

Reaction Steps

1-{1-[4-(2-Carboxyethyl)benzoyl]-4-piperidinyl}-3,4-dihydrocarbostyril (2 g) is dissolved in methanol (50 ml) and thereto is added dropwise thionyl chloride (1.1 ml) under ice cooling. After adding, the mixture is stirred at 0°-5° C. for 1 hour and further at room temperature overnight. The solvent is concentrated and the resulting residue is purified by silica gel column chromatography (solvent: n-hexane:ethyl acetate=1:1) and recrystallized from n-hexane to give 1-{1-[4-(2-methoxycarbonylethyl)benzoyl]-4-piperidinyl}-3,4-dihydrocarbostyril (1.46 g) as white powder, m.p.: 85°-86° C.

Provenance & Evidence