Trityl chloride → (r)-2,3,4,5-Tetrahydro-1-(1-(triphenylmethyl)-imidazol-4-ylmethyl)-4-(methylsulfonyl)-3-(phenylmethyl)-1h-1,4-benzodiazepine-7-carbonitrile

Participants

Reaction Steps

To a solution of 1.2 g (2.85 mmol) of the free base of Example 225 in 20 ml of acetonitrile, at rt and under argon, was added 1.2 ml (8.55 mmol) of TEA, followed by 1.2 g (4.3 mmol) of triphenylmethyl chloride. Stirring was continued overnight. The resulting cloudy solution was evaporated to dryness and the residue subjected to flash chromatography on a 100 cc column of silica gel (50% ethyl acetate-hexane) to afford 1.2 g (64%) of Cmpd A as a viscous white foam.

Provenance & Evidence