Dimethylformamide → HCID 178465570, compound

Participants

Reaction Conditions

Reaction Steps

To a mixed liquid of 269 mg of (3RS,4RS)-2-[(1SR,2SR)-2-aminocyclohexyl]-N-(benzyloxy)-3-(2,4-dichlorophenyl)-1-oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxamide and 5 ml of DMF were added 58 mg of sodium carbonate and 119 mg of methyl ethanimidothioate hydrochloride, followed by stirring at 60° C. for 1 hour. Thereafter, while stirring at 60° C., 233 mg of sodium carbonate and 478 mg of methyl ethanimidothioate hydrochloride were further added in four divided portions every 1 hour. After cooling the reaction solution, water was added thereto, followed by extraction with chloroform-isopropyl alcohol (5:1). The organic layer was dried over anhydrous magnesium sulfate and then concentrated. The residue was purified by silica gel column chromatography (eluent: chloroform-methanol-aqueous ammonia) and then crystallized with ethyl acetate to obtain 113 mg of (3RS,4RS)—N-(benzyloxy)-3-(2,4-dichlorophenyl)-2-[(1SR,2SR)-2-(ethanimidoylamino)cyclohexyl]-1-oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxamide as a white crystal.

Provenance & Evidence