Chiral proton catalysis of secondary nitroalkane additions to azomethine: synthesis of a potent GlyT1 inhibitor
作者:Tyler A. Davis、Michael W. Danneman、Jeffrey N. Johnston
DOI:10.1039/c2cc32225k
日期:——
The first enantioselective synthesis of a potent GlyT1 inhibitor is described. A 3-nitroazetidine donor is used in an enantioselective aza-Henry reaction catalyzed by a bis(amidine)-triflic acid salt organocatalyst, delivering the key intermediate with 92% ee. This adduct is reductively denitrated and converted to the target through a short sequence, thereby allowing assignment of the absolute configuration of the more potent enantiomer.
报道了首个高效GlyT1抑制剂的手性选择性合成方法。在双(双胯)-三氟乙酸盐有机催化剂催化下,以3-硝基氮杂环丁烷为供体,进行手性选择性aza-Henry反应,得到关键中间体,其对映体过量率达92%。该加合物经还原去硝化反应后,通过一系列短步骤转化为目标产物,从而确定了更具药效的对映体的绝对构型。