反应详情

200 mg of 5,5,6,6-tetramethyl-2-(4-nitrophenoxy)-5,6-dihydro-1,4,3-oxathiazine 4,4-dioxide and 130 mg of methyl(S)-3-amino-3-(2-chlorophenyl)propionate were dissolved in 5 ml of dichloromethane and 0.52 ml of N,N-diisopropylethylamine, and the mixture was stirred at room temperature for 16 hours. Subsequently, the reaction solution was diluted with 20 ml of dichloromethane and washed repeatedly with 20 ml of 25% aqueous ammonia solution, until the organic phase was colorless. The organic phase was dried over Na2SO4 and concentrated by rotary evaporation. This gave the product (191 mg) with a molecular weight of 402.9 g/mol (C17H23ClN2O5S); MS (ESI): m/e=403 (M+H+).

1. washwashed repeatedly with 20 ml of 25% aqueous ammonia solution, until the organic phase
2. dry with materialThe organic phase was dried over Na2SO4
3. concentrationconcentrated by rotary evaporation