Abstract
AbstractSynthesis of 3‐methylpiperidine from 1,5‐diamino‐2‐methylpentane in preparative scale is reported by using recombinant Escherichia coli cells expressing a variant of the diamine oxidase from Rhodococcus erythroprolis and an imine reductase from Streptosporangium roseum. Optimization of process parameters for cultivation and bioconversion led to substantial improvements in the initial laboratory procedure. The transformation of the methyl‐substituted diamine substrate to the N‐heterocyclic product was successfully scaled‐up from shake‐flask to a 20 L bioreactor with increased substrate concentrations. Remarkably, we obtained 67 % of 3‐methylpiperidine product from 140 g substrate within 52 h.
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