Highly Stereocontrolled Synthesis of gem-Difluoromethylenated Azasugars: d- and l-1,4,6-Trideoxy-4,4-difluoronojirimycin
摘要:
D-1,4,6-Trideoxy-4,4-difluoronojirimycin and L-1,4,6-trideoxy-4,4-difluoronojirimycin, a novel series of gem-4,4-difluoromethylenated azasugars, were synthesized from CF3CH2OH in 10 steps. A key step was the highly diastereoselective construction of the piperidine ring via reductive amination.