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 8 ml of dichloromethane was treated with 0.287 g of 2-phthalimidoethanesulphonyl chloride and 0.1 ml of pyridine at room temperature under a nitrogen atmosphere. The mixture was stirred for 2 hours at room temperature and a further 0.287 g of 1,3-dioxo-2-phthalimidoethanesulphonyl chloride was added. The mixture was stirred overnight at room temperature and evaporated. The residue was dissolved in ethyl acetate and washed in sequence with water, 5% aqueous citric acid, water, 5% aqueous sodium hydrogen carbonate and saturated aqueous sodium chloride. Drying over anhydrous magnesium sulphate and evaporation gave a residue which was triturated with diethyl ether to give 0.47 g of (E)-2(R)-[1(S)-[(tetrahydro-2(RS)-pyranyloxy)carbamoyl]-4-phenyl-3-butenyl]-2′-isobutyl-2′-(1,3-dioxo-2-phthalimidoethanesulphonyl)-4-methylvalerohydrazide in the form of a pale yellow solid.

1. stirringThe mixture was stirred overnight at room temperature
2. customevaporated
3. dissolutionThe residue was dissolved in ethyl acetate
4. washwashed in sequence with water, 5% aqueous citric acid, water, 5% aqueous sodium hydrogen carbonate and saturated aqueous sodium chloride
5. dry with materialDrying over anhydrous magnesium sulphate and evaporation
6. customgave a residue which
7. customwas triturated with diethyl ether