L-Cysteine ethyl ester hydrochloride synthesis
- Product Name:L-Cysteine ethyl ester hydrochloride
- CAS Number:868-59-7
- Molecular formula:C5H12ClNO2S
- Molecular Weight:185.67
Yield:868-59-7 98.1%
Reaction Conditions:
with thionyl chloride for 15 h;Cooling with ice;Reflux;
Steps:
1.A Step A: Synthesis of L-cysteine ethyl ester hydrochloride
L-cysteine (24.20 g, 0.20 mol) and 300 mL of ethanol were placed in a 500 mL eggplant-shaped flask. Thionyl chloride (22 mL, 0.30 mol) was slowly added dropwise under ice-water bath. After the completion of the dropwise addition, the reaction was continued for 3 hours at room temperature, and the reaction was heated under reflux for 12 h. The reaction solution was cooled to room temperature, and the solvent was evaporated to give a white powder (yield: 36.42 g).
References:
CN107021937,2019,B Location in patent:Paragraph 0034; 0035; 0036
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