反应详情

A solution of 2.15 g of 2(R)-[1(S)-(tert-butoxycarbonyl)-4-phenylbutyl]-4-methylvalerohydrazide and 1.86 g of N-(benzyloxycarbonyl)-glycine in 8 ml of dimethylformamide was cooled to 0° C. and treated with 2.0 g of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride. The mixture was stirred overnight at room temperature, diluted with diethyl ether and washed sequentially with 2M aqueous hydrogen chloride, 5% aqueous sodium hydrogen carbonate, water, and saturated aqueous sodium chloride. The organic phase was dried over anhydrous magnesium sulphate and evaporated to give 2.96 g of 2(R)-[1(S)-(tert-butoxycarbonyl)-4-phenylbutyl]-2′-[N-(benzyloxycarbonyl)-glycinyl]-4-methylvalerohydrazide in the form of a white foam.

1. washwashed sequentially with 2M aqueous hydrogen chloride, 5% aqueous sodium hydrogen carbonate, water, and saturated aqueous sodium chloride
2. dry with materialThe organic phase was dried over anhydrous magnesium sulphate
3. customevaporated