Title:
METHODS FOR IMPROVING YIELDS OF L-GLUFOSINATE
Document Type and Number:
WIPO Patent Application WO/2020/051188
Kind Code:
A8
Abstract:
Compositions and methods for the production of L-glufosinate are provided. The method involves converting racemic glufosinate to the L-glufosinate enantiomer or converting PPO to L-glufosinate in an efficient manner. In particular, the method involves the specific amination of PPO to L-glufosinate, using L-glutamate, racemic glutamate, or another amine source as an amine donor. PPO can be obtained by the oxidative deamination of D-glufosinate to PRO (2- oxo-4-(hydroxy(methyl)phosphinoyl)butyric acid) or generated via chemical synthesis. PPO is then converted to L-glufosinate using a transaminase in the presence of an amine donor. When the amine donor donates an amine to PPO, L-glufosinate and a reaction by product are formed. Because the PPO remaining represents a yield loss of L-glufosinate, it is desirable to minimize the amount of PPO remaining in the reaction mixture. Degradation, other chemical modification, extraction, sequestration, binding, or other methods to reduce the effective concentration of the by-product, i.e., the corresponding alpha ketoacid or ketone to the chosen amine donor will shift the reaction equilibrium toward L-glufosinate, thereby reducing the amount of PPO and increasing the yield of L-glufosinate. Therefore, the methods described herein involve the conversion or elimination of the alpha ketoacid or ketone by-product to another product to shift the equilibrium towards L-glufosinate.
Inventors:
GREEN BRIAN MICHAEL (US)
ESTRIDGE DANIELLE MARIE (US)
ESTRIDGE DANIELLE MARIE (US)
Application Number:
PCT/US2019/049467
Publication Date:
May 14, 2020
Filing Date:
September 04, 2019
Export Citation:
Assignee:
AGRIMETIS LLC (US)
International Classes:
C12P7/52; A01N57/20; C12N9/06; C12N9/10; C12N9/88; C12P9/00; C12P13/04
Attorney, Agent or Firm:
DAVIS, Kimberlynn B. et al. (US)
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