摘要:
A series of novel piperidine ring modified analogs of (+/-)-threo-methyl phenyl (piperidin-2-yl)acetate was synthesized by direct alkylation and reductive amination procedure, using sodium borohydride over molecular sieves. The chemical structures of these compounds were established based on mass spectra, H-1 NMR spectra, and CHN elemental analysis data. Several significant modifications in the literature methodologies were made to make the reaction more efficient, and good yields were generally obtained.