反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
AUXILIARIES
试剂、催化剂与溶剂
CONDITIONS
反应条件
- 温度
- 10 °C
PROCEDURE
实验过程
TIPPS-3-cyano-(L)-phenylalanine (215 g; 0.435 mmol; 93% purity), ethyloxycarbonylpiperazine (68.8 g; 0.435 mmol) and 1-hydroxybenzotriazole. (13.3 g; 0.087 mol) were dissolved in 650 ml of DMF and cooled to 10° C. A solution of dicyclohexylcarbodiimide (98.7 g; 0.478 mol) in 216 ml of DMF was added dropwise over a period of 2 h and the reaction solution was stirred at RT overnight. After evaporating the solvent, the residue was dissolved in 436 ml of MTBE, the precipitate was filtered off, and the organic solution was extracted in each case 2× with 5% KHSO4, 5% NaHCO3 and distilled water. The solvent was evaporated under vacuum, toluene was added and then evaporated in a rotary evaporator and the product was dried under vacuum.
WORKUP
后处理
- customAfter evaporating the solvent
- dissolutionthe residue was dissolved in 436 ml of MTBE
- filtrationthe precipitate was filtered off
- extractionthe organic solution was extracted in each case 2× with 5% KHSO4, 5% NaHCO3
- distillationdistilled water
- customThe solvent was evaporated under vacuum, toluene
- additionwas added
- customevaporated in a rotary evaporator
- customthe product was dried under vacuum