Method for preparing a cyano-1- cyclohexyl-acetic acid

The present invention discloses a method for preparing a cyano-1- cyclohexyl-acetic acid, is first transformed using microorganisms for the substrate 1-cyano-cyclohexyl catalytic acetonitrile, then separated using the method of the conversion step solution was separated and purified, finally obtained a residual protein 100PPM less, the yield above 85%, product purity of 98%, a good solution to the problem of too high produce toxic effects on the subsequent hydrogenation reaction catalyst gabapentin Since protein concentration also increased gabapentin production.