A method for obtaining l-glufosinate
AssigneeUpl Ltd
InventorsChandrasekhar Dayal MUDALIAR, Ashishkumar Ravindra MISHRA, Mukesh DESHMUKH, Prashant KINI
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Abstract
The present invention relates to a safer, easier and cost-effective method for preparing L-glufosinate or salts thereof. The present invention further relates to a novel L-glufosinate quinine tetrahydrate salt and its use in a method for obtaining L-glufosinate or salts thereof.
Claims26
A method for obtaining L-glufosinate or salts thereof, said method comprising:
- a) reacting glufosinate or its salt with a chiral base to obtain a salt of L-glufosinate and the chiral base;
- b) dissolving said salt of L-glufosinate and chiral base in water and adjusting pH to 6 to 9 with a base to precipitate the chiral base;
- and
- c) removing said precipitated chiral base to obtain the L-glufosinate or salts thereof.
A method for obtaining L-glufosinate or salts thereof, said method comprising:
- a) reacting glufosinate or its salt with quinine to obtain L-glufosinate quinine tetrahydrate salt;
- b) dissolving said L-glufosinate quinine tetrahydrate salt in water and adjusting pH to 6 to 9 with a base to precipitate quinine;
- and
- c) removing said precipitated quinine to obtain L-glufosinate or salts thereof.
A method for obtaining L-glufosinate quinine tetrahydrate salt, said method comprising:
- a) reacting a reaction mixture of glufosinate or its salt with quinine in presence of catalyst and a solvent consisting of water and tert-butanol and
- b) cooling the reaction mixture and isolating the L-glufosinate quinine tetrahydrate salt.
A salt consisting of L-glufosinate quinine tetrahydrate salt.
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Dependencies are inferred from the claim text.