Butanal → HCID 11035207, compound

Participants

Reaction Steps

To 2-(2-fluorophenyl)-7,8,9,10-tetrahydro-imidazo[1,2-c]pyrido[3,4-e]pyrimidin-5(6H)-one (171 mg, 0.6 mmol) in pH4-5 HCL-methanol (6 mL) at room temperature was added n -butyraldehyde (53 uL, 0.6 mmol) and sodium cyanoborohydride (38 mg, 0.6 mmol). After the reaction mixture was stirred for 6 hours, concentrated HCl was added until the mixture became homogenous. The mixture was then diluted with water (5 mL) and extracted twice with ether. The aqueous layer was made alkaline with aqueous ammonium hydroxide, saturated with sodium chloride, and extracted twice with 10% methanol/ethyl acetate. The combined organic layers were dried over magnesium sulfate, filtered and concentrated to give 9-n-Butyl-2-(2-fluorophenyl)-7,8,9,10-tetrahydro-imidazo[1,2-c]pyrido[3,4-e] pyrimidin-5(6H)-one (Compound 48). Recrystallization from aqueous ethanol gave a white fluffy solid, m.p. 251°-253° C. (d).

Provenance & Evidence