تفاعل #555221

معادلة التفاعل

acetic acid

L-cysteine hydrochloride

ethyl bromide

Ammonia water

→

desired product

S-ethyl-L-cysteine

المذيبات

water

water

ظروف التفاعل

المعالجة

1. 1
   أخرىis formed
2. 2
   workup.ADDITIONto further dilute the mixture
3. 3
   أخرىAfter 2 hours reaction

الإجراء التجريبي

SEC is synthesized from L-cysteine hydrochloride (1.58 g, 0.01 mol) and ethyl bromide (1.09 g, 0.01 mol) with the following steps. The reaction mixture is diluted with water in a titration manner until a clear solution is formed. No more than necessary amount of water should be added to further dilute the mixture. Ammonia water was added to PH 9.5-10 with stirring at room temperature. After 2 hours reaction, the mixture is acidified with acetic acid to PH 5-5.5. The desired product was cooled in the refrigerator, filtered and washed successively with water and ethyl ether. The chemical structure of SEC is determined by Proton Nuclear Magnetic Resonance Spectroscopy.

المصدر