Excellent N-Acetyl-L-Thioproline with High Quality

• CAS No.: 54323-50-1
• Color: White
• Appearance: Powder
• Transport Package: Paper
• Specification: large
• Trademark: china
• Model NO.: E1422
• Origin: China
• HS Code: 2930400000
• Production Capacity: 5000kg/Year

Product Description

The invention relates to a method for preparing N-acetyl-DL-thioproline. The method comprises the following steps: taking a proper amount of N-acetyl-L-thioproline, adding acetic acid, dissolving, heating, adding keeping temperature at 90 DEG.C, standing for 3.5 hours, racemizing, recycling acetic acid under reduced pressure, adding water, catching acid, cooling, crystallizing and drying. N-acetyl-L-thioproline is used as raw material and dissolved by using acetic acid, 1-2mol of used for racemizing at 80-100 DEG.C to avoid the production of byproducts, the acetic acid recycling rate is high, the production links are reduced, and alkali is prevented from participating in the reaction.

The invention relates to a method for preparing N-acetyl-DL-thioproline. The method comprises the following steps: taking a proper amount of N-acetyl-L-thioproline, adding acetic acid, dissolving, heating, adding keeping temperature at 90 DEG.C, standing for 3.5 hours, racemizing, recycling acetic acid under reduced pressure, adding water, catching acid, cooling, crystallizing and drying. N-acetyl-L-thioproline is used as raw material and dissolved by using acetic acid, 1-2mol ofs used for racemizing at 80-100 DEG.C to avoid the production of byproducts, the acetic acid recycling rate is high, the production links are reduced, and alkali is prevented from participating in the reaction.

The invention relates to a method for preparing N-acetyl-DL-thioproline. The method comprises the following steps: taking a proper amount of N-acetyl-L-thioproline, adding acetic acid, dissolving, heating, addingeeping temperature at 90 DEG.C, standing for 3.5 hours, racemizing, recycling acetic acid under reduced pressure, adding water, catching acid, cooling, crystallizing and drying. N-acetyl-L-thioproline is used as raw material and dissolved by using acetic acid, 1-2mol of ed for racemizing at 80-100 DEG.C to avoid the production of byproducts, the acetic acid recycling rate is high, the production links are reduced, and alkali is prevented from participating in the reaction.