The present invention relates to a process for preparing 6-(1-propenylpyridin-4-yl)-2-(4-phenoxyphenyl)nicotamine (compound I) in large quantities of more than 1 kg. The process provides a good yield and at least 95% purity of the final product, and provides a controllable and safe reaction.本發明涉及大於1公斤的大量製備6-(1-丙烯醯基呱啶-4-基)-2-(4-苯氧基苯基)尼克醯胺(化合物I)的工藝。該工藝提供了良好的產率和至少95%純度的終產品,並提供可控且安全的反應。