Sodium hydride → HCID 178451120, compound

Participants

Reaction Conditions

Reaction Steps

N-[(4-Chloro-1-guanidino-7-isoquinolinyl)sulphonyl]-β-alanine trifluoroacetate ##STR14## Guanidine hydrochloride (140 mg, 1.46 mmol was added in one portion to a stirred suspension of NaH (35 mg, 80% dispersion by wt in mineral oil, 1.17 mmol) in DME (8.0 mL) and the mixture was heated at 30° C. under N2 for 30 min. N-[(1,4-Dichloro-7-isoquinolinyl)sulphonyl]-β-alanine t-butyl ester (150 mg, 0.37 mmol) was added and the mixture heated at 90° C. for 18 h. The cooled mixture was diluted with EtOAc, washed with water, brine, dried (MgSO4) and evaporated in vacuo. The residue was purified by column chromatography upon silica gel using CH2Cl2 -MeOH-0.880NH3 (97:3:0.3 to 95:5:0.5) as eluant to give N-[(4-chloro-1-guanidino-7-isoquinolinyl)sulphonyl]-β-alanine t-butyl ester (75 mg, 0.175 mmol) as a yellow foam

Provenance & Evidence