Process for the preparation of cyclic sulfonate-derived compounds
By reacting compounds of general formula 1 with thioacetic acid and performing oxidative cyclization reactions, combined with specific solvents and catalysts, the problems of purification difficulty and low yield of cyclic sulfonate derivatives were solved, achieving high yields and improved product properties.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- LG CHEM LTD
- Filing Date
- 2023-01-09
- Publication Date
- 2026-06-16
AI Technical Summary
In the existing technology, the preparation process of cyclic sulfonate derivatives has problems such as high purification difficulty, low yield and black tar form of product, especially when using SOCl2 to generate corrosive gas.
The compound of general formula 1 was reacted with thioacetic acid, followed by an oxidative cyclization reaction. The reaction conditions were controlled using specific solvents and catalysts, including polar aprotic solvents and acid catalysts, with the temperature controlled between 20°C and 40°C and between 0°C and 25°C, and oxidants such as H2O2 were used.
The yield of cyclic sulfonate derivatives was improved, and the properties of the product were enhanced to make it colorless or pale yellow, thus solving the problems of purification difficulty and product properties in the prior art.
Smart Images
Figure CN117561243B_ABST