L-2 aminobutyric acid molecular formula C4H9NO2, molecular weight 103.12, CAS No. 1492-24-6, EINECS No. 216-083-3, it is a kind of non natural chiral α -amino acid, mainly used as pharmaceutical raw materials in the field of medicine, L-2-aminobutyric acid can be used in the synthesis of levetiracetam, ethambutol and other drugs.
There are transaminase method, amino acid oxidase method, dehydrogenase method, chemical enzyme method and other methods can be used to prepare L-2-aminobutyric acid. At present, transaminase method is mainly used to produce L-2-aminobutyric acid. In the past, L-2-aminobutyric acid was prepared with glutamic acid and ketoic acid as raw materials, and l-2-aminobutyric acid could be obtained under the action of amino acid transaminase. The yield of L-2-aminobutyric acid obtained by this method was low, and then threonine was used as raw material to produce L-2-aminobutyric acid with three enzymes system, which not only had low yield, but also had an effect on the product purification of by-products. The amino acid oxidase method needs to prepare L-2-aminobutyric acid with D-amino acid oxidase under the action of metal catalyst. This method has high cost and cannot achieve large-scale production, which is not suitable for industrial production.