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PYROGLUTAMATS AND THEIR APPLICATION FOR THE SEPARATION OF OPTICAL ISOMERS OF INTERMEDIATE PRODUCTS OF SYNTHESIS OF DEXSTROCETHIRISIN AND LEVOCETIRISIN
PYROGLUTAMATS AND THEIR APPLICATION FOR THE SEPARATION OF OPTICAL ISOMERS OF INTERMEDIATE PRODUCTS OF SYNTHESIS OF DEXSTROCETHIRISIN AND LEVOCETIRISIN
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机译:焦葡聚糖及其在分离右旋糖皮质激素和左旋心磷脂中间产物的光学异构体中的应用
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摘要
The application describes a salt of (S) -2- [4- (4-chlorobenzhydryl) piperazin-1-yl] ethoxyacetamide with (S) -pyrrolidone-5-carboxylic acid; a salt of (R) -2- [4- (4-chlorobenzhydryl) piperazin-1-yl] ethoxyacetamide with (S) -pyrrolidone-5-carboxylic acid; a salt of (S) -2- [4- (4-chlorobenzhydryl) piperazin-1-yl] ethoxyacetamide with (R) -pyrrolidone-5-carboxylic acid and a salt of (R) -2- [4- (4-chlorobenzhydryl) piperazine -1-yl] ethoxyacetamide with (R) -pyrrolidone-5-carboxylic acid. The application also describes a method for producing (S) -2- [4- (4-chlorobenzhydryl) piperazin-1-yl] ethoxyacetamide (I) and (R) -2- [4- (4-chlorobenzhydryl) piperazin-1-yl ] ethoxyacetamide (II) by chemical separation of the mixture. These compounds are intermediates for the synthesis of dextrocetirizine and levocetirizine, respectively.
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