Preparation method of [N-methyl-pyridine-2-yl] carbamate-1-ethyl chloride

The invention relates to a preparation method of [N-methyl-N-3-((tert-butoxycarbonyl methyl amino) acetoxy methyl) pyridine-2-yl] carbamate-1-ethyl chloride. The method is as below: first reacting 2-(N-methyl amino)-3- hydroxymethyl pyridine with Boc-sarcosine at low temperature; and reacting with 1-chloroethyl chloroformate. The invention has the advantages of mild reaction condition and simple process and high purity of products, and meets the basic requirements of industrial enlargement production.