Dichloromethane → HCID 59718448, compound

Participants

Reaction Steps

To a solution of Fmoc-Cys(SStBu)-OH (1, 2.15 g, 5.0 mmole) dissolved in anhydrous CH2Cl2 (30 mL) was added N-Ethyl-N′-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDAC, 1.146 g, 6 mmole), the reaction mixture was stirred for 10 min. at room temperature (RT) and then added N-hydroxysuccinimide (NHS) (0.690 g, 6.0 mmole). To this reaction mixture was added catalytic amount of N,N′-dimethlyaminopyridine and stirred at RT until completion of reaction tested with TLC. The solvent was evaporated and the residue obtained was extracted with ethyl acetate (50 mL×2), washed with 1M NaHCO3 (10 mL), followed by brine solution (20 mL) and dried over anhydrous Na2SO4. Evaporation of the solvent afforded 2 as a white crystalline solid. Yield. 2.5 g (95%).

Provenance & Evidence