1,2-Dichloroethane → HCID 136337186, compound

Participants

Reaction Conditions

Reaction Steps

Titanium (IV) chloride (0.377 mL, 3.43 mmol) was carefully added to a solution of 1-{ethoxycarbonylamino-[4-(pyrrolidine-1-carbonyl)-phenylimino]-methyl}-1H-pyrazole-4-carboxylic acid ethyl ester (0.977 g, 2.29 mmol) and DCE (5.5 mL). The reaction mixture was heated to 100° C. for 2.5 h and was then cooled to room temperature and quenched with ethanol (10 mL). The resulting solution was concentrated and the residue was partitioned between DCM (30 mL) and water (30 mL). The two layers were filtered to remove a solid byproduct and then separated. The aqueous layer was washed with DCM (30 mL) and the combined organic layers were washed with brine (30 mL), dried (MgSO4), and concentrated. The residue was triturated with diethyl ether and then with ethanol to yield the titled compound (18 mg, 2.0% yield). MS (ESI/Cl): mass calcd. for C19H19N5O4, 381.1; m/z found, 382.1 [M+H]+.

Provenance & Evidence