METHOD FOR ENANTIOSELECTIVE SYNTHESIS OF (S)-PREGABALIN Russian patent published in 2014 - IPC C07C229/08 C07C227/32 B01J23/755 

Abstract RU 2529996 C2

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing (S)-pregabalin of formula I , which is used in therapy of a range of neuropathic diseases. The method includes enantioselective addition of diethyl malonate to 4-methyl-1-nitropentene-1 followed by reduction and acid hydrolysis of the addition product in accordance with the given scheme. The catalyst used at the addition step is a complex of nickel (II) of formula II with (S,S)-N,N'-dibenzylcyclohexane-1,2-diamine.

EFFECT: method reduces catalyst consumption, reduces the number of steps and amount of solvents used, thereby making the process simpler and cheaper.

4 cl, 10 ex

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RU 2 529 996 C2

Authors

Reznikov Aleksandr Nikolaevich

Sidnin Evgenij Anatol'Evich

Klimochkin Jurij Nikolaevich

Dates

2014-10-10Published

2012-10-18Filed