Diisopropylethylamine → (S)-4-(benzyloxycarbonyl)-1-[N-(3-methylphenyl)-N-phenylcarbamoyl]piperazine-2-carboxylic acid

Participants

Reaction Steps

A mixture of 264 mg (1 mmole) of (S)-4-(benzyloxycarbonyl)piperazine-2-carboxylic acid, 265 mg (1.1 mmole) of N-(3-methylphenyl)-N phenylcarbamoyl chloride. 390 mm (3 mmole) of DIEA in 5 mL of DMF was stirred for 16 hr at room temperature. The solution was concentrated in vacuo and the residure was taken up in 50 mL of CH2CL2 and washed with 2×25 mL of 1N HCl. Concentration in vacuo gave 0.55 g of an oil, which was carried on in Step C.

Provenance & Evidence