Two polyhydroxylated piperidines have been prepared in short sequences from diacetone gluco- and allofuranose. The key step is a piezo-aza-Michael addition of diphenylmethanamine to enoates bearing a sugar moiety in the γ-position. The combination of ultra-high pressure associated to the presence of readily available sugars chiral pool led to the expected chiral amines in good yields and excellent stereoselectivities.
我们从二
丙酮葡糖和全
呋喃糖中以简短的顺序制备出了两种多羟基
哌啶。关键步骤是将二苯基
甲胺与在γ-位上含有糖分子的烯酸盐进行压阻-扎-迈克尔加成。结合超高压和易于获得的糖手性池,最终获得了预期的手性胺,而且产率高,立体选择性极佳。