反应详情

25.00 g (132 mmol) 3-tert-butoxycarbonylamino-propionic acid, 13.50 g (132 mmol) isobutyric acid hydrazide, 50.91 g (159 mmol) O-(1H-benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate (TBTU) and 50 ml diisopropylethylamine are stirred in 500 ml of tetrahydrofuran/dichloromethane for 24 hours at ambient temperature. Then the mixture is evaporated down, the residue is extracted with ethyl acetate and 10% potassium hydrogen carbonate solution. The organic phase is dried and evaporated to dryness. The residue is crystallised from toluene/isopropylether.

1. customThen the mixture is evaporated down
2. extractionthe residue is extracted with ethyl acetate and 10% potassium hydrogen carbonate solution
3. customThe organic phase is dried
4. customevaporated to dryness
5. customThe residue is crystallised from toluene/isopropylether