反应详情

A solution of 0.459 g of (E)-2(R)-[1(S)-[(tetrahydro-2(RS)-pyranyloxy)carbamoyl]-4-phenyl-3-butenyl]-2′-isobutyl-4-methylvalerohydrazide in 3 ml of dichloromethane was treated under nitrogen at room temperature with 0.119 g of pyridine and a solution of the acid chloride prepared from 0.42 g of N-(9-fluorenylmethyloxycarbonyl)-cycloleucine in 3 ml of dichloromethane. The mixture was stirred at room temperature for 16 hours and diluted with ethyl acetate. The solution was washed with 5% aqueous sodium hydrogen carbonate solution, water and saturated sodium chloride solution and then dried over anhydrous magnesium sulphate. The solvent was evaporated to give a foam, which was crystallized from diethyl ether/hexane to give 0.71 g of (E)-2′-[(1-(9-fluorenylmethyloxycarbonylamino)-1-cyclopentyl)carbonyl]-2(R)-[1(S)-[(tetrahydro-2(RS)-pyranyloxy)carbamoy]-4-phenyl-3-butenyl]-2′-isobutyl-4-methylvalerohydrazide as a white solid.

1. washThe solution was washed with 5% aqueous sodium hydrogen carbonate solution, water and saturated sodium chloride solution
2. dry with materialdried over anhydrous magnesium sulphate
3. customThe solvent was evaporated
4. customto give a foam, which
5. customwas crystallized from diethyl ether/hexane