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AssigneeVulpes Agricultural Corp.
InventorsDihu Yu, Rick Shang
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The present disclosure describes an L-S2-amino-4-halobutyric acid derivative-L-tartrate salt. The present disclosure also describes a method of preparing L-S-amino-4-halobutyric acid derivative-L-tartrate salt, comprising the following steps: using D, L-S2-amino-4-halobutyric acid derivative enantiomeric mixture as the raw material, using L-tartrate as the resolution agent, and obtaining L-S2-Amino-4-halobutyric acid derivative-L-tartrate by resolution reaction, crystallization and filtration in the same resolution agent system; or the enantiomeric mixture of D, L-S2-amino-4-halobutyric acid derivatives is used as raw material, L-tartrate is used as resolution agent under aromatic aldehyde catalysis or aromatic aldehyde and organic acid co-catalysis, and dynamic resolution reaction is carried out in the same resolution agent system, further comprising crystallization and filtration to obtain L-S2-amino-4-halobutyric acid derivative-L-tartrate.
An L-2-amino-4-halobutyric acid derivative-L-tartrate with a structure of formula I:
A method of preparing a L-2-amino-4-halobutyric acid derivative-L-tartaric acid salt, the method comprising:
A method of preparing a L-2-amino-4-halobutyric acid derivative-L-tartaric acid salt, the method comprising:
Dependencies are inferred from the claim text.