There is disclosed a novel method for the syntheses of chiral pyrrolidines and piperidines by the intramolecular ring closure of anomeric mixtures of 4-amino- and 5-amino-2-trifluoromethanesulfonates of methyl furanosides. The novel method preferably provides for the efficient syntheses from diacetone glucose of 1,4-dideoxy-1,4-imino-D-arabinitol - known as DAB1, (2S,3R,4R)-3,4-dihydroxyproline, fagomine [1,5-imino-1,2,5-trideoxy-D-arabino-hexitol], and (2S,3R,4R)-3,4-dihydroxypipecolic acid by intramolecular nucleophilic displacement by an amino function of 2-O-trifluoromethanesulphonates of anomeric mixtures of methyl furanosides.
本发明公开了一种通过甲基
呋喃糖苷的 4-
氨基和 5-
氨基-2-
三氟甲磺酸异构体混合物的分子内环闭合合成手性
吡咯烷和
哌啶的新方法。这种新方法可以从二
丙酮葡萄糖中高效合成 1,4-二脱氧-1,4-亚
氨基-
D-阿拉伯糖醇(又称
DAB1)、(2S,3R,4R)-3,4-二羟基脯
氨酸、法戈明[1,5-亚
氨基-1,2、和(2S,3R,4R)-3,4-二羟基
哌啶酸的分子内亲核置换。