A series of cinnamyl morpholine(2a～2i)were synthsized by the chlorination of substituted cinnamic acids(1a～1i)with thionyl chloride in DMAc at 0 ℃ for 20 min，followed by amidation in situ with morpholine at 25 ℃ for 7 h. The yield of 2a～2i were 81.6%～95.4%. The structures were characterized by 1H NMR、13C NMR、IR and MS. The proposed mechanism for the promotion of dimethylacetamid on the syntehsis was suggested.