Derivatives of 2-pyrrolidone-5-carboxylic acid and method of obt

Details Derivatives of 2-pyrrolidone-5-carboxylic acid and method of obt Derivatives of 2-pyrrolidone-5-carboxylic acid and method of obt

1989-10-04

1990-08-28

Brust, Joseph Paul

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D20712

Patent

active

049527061

ABSTRACT:
The new, crystalline trihydrates of sodium L- and D-2-pyrrolidone-5-carboxylate. These trihydrates can be obtained by adjusting the concentration and the temperature in an aqueous solution of sodium L- or D-2-pyrrolidone-5-carboxlate in such a manner that the solubility of the desired trihydrate is exceeded.

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patent: 2806855 (1957-09-01), Hoglan
patent: 2984684 (1961-05-01), Fike
patent: 3153049 (1964-10-01), Melis et al.
patent: 3185703 (1965-05-01), Kageyama et al.
patent: 3235563 (1966-02-01), Noyori
patent: 3952011 (1976-04-01), Dazai
patent: 4097490 (1978-06-01), Reinhold

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