4-Bromo-1,1,1-trifluorobutane → HCID 22392982, compound

Participants

Reaction Steps

To a solution of 3-(benzoxycarbonyl)amino-2,3-dihydro-5-phenyl-1H-1,4-benzodiazepin-2-one (3.7 g, 9.61 mmol) in 40 mL of anhydrous DMF at 0° C. was added potassium tert-butoxide (1.6 g, 14.4 mmol) in one portion. The reaction mixture was stirred 20 m. and 4,4,4-trifluoro-1-bromobutane (Lancaster; Windham, N.H.; 2.6 g, 13.4 mmol) was added. The reaction mixture was warmed to room temperature over 30 min. and the n diluted with 100 mL of water and 200 mL of methylene chloride. The layers were separated. The organic layer was extracted with water and dried over sodium sulfate. Purification of the crude product by silica gel column chromatography (0-3% ethyl acetate/methylene chloride) gave 1.52 g (32%) of an off white foam.

Provenance & Evidence