tert-butyl (E)-[5-(3,4-dichlorostyryl)-2,3-dihydro-1-methyl-1H-1,4-benzodiazepin-7-yl]carbamate → (E)-5-(3,4-dichlorostyryl)-2,3-dihydro-1-methyl-1H-1,4-benzodiazepin-7-amine hydrochloride

Participants

Reaction Steps

To a solution of 11 mg (0.025 mmol) of tert-butyl (E)-[5-(3,4-dichlorostyryl)-2,3-dihydro-1-methyl-1H-1,4-benzodiazepin-7-yl]carbamate in 0.5 ml of acetonitrile and 1 drop of anisole was added 1 drop of trifluoroacetic acid. The solution was stirred for 20 minutes, concentrated under reduced pressure and the residue partitioned between brine and dichloromethane. The organic phase was dried over magnesium sulphate, filtered and evaporated, redissolved in a solution of hydrogen chloride in ethyl acetate and the solvent removed to afford 7.9 mg of (E)-5-(3,4-dichlorostyryl)-2,3-dihydro-1-methyl-1H-1,4-benzodiazepin-7-amine hydrochloride as a red solid MS: m/e 346.2 [M+H]+.

Provenance & Evidence