Diastereoselective Addition of Amines to Vinyl Sulfone Modified Carbohydrates: A Highly Flexible Methodology for the Synthesis of New Classes of Deoxyaminosugars
作者:Bindu Ravindran、Kandasamy Sakthivel、Cheravakkattu. G. Suresh、Tanmaya Pathak
DOI:10.1021/jo991380d
日期:2000.5.1
addition reaction with various amines to develop a new methodology for the synthesis of new classes of aminosugars. Compound 5 alpha reacted with primary amines to generate gluco- derivatives, but secondary amines produced both gluco- (major) and manno- (minor) isomers. Compound 5 beta, on the other hand, produced only gluco- isomers with both primary and secondary amines. The stereochemical course of addition
甲基2,3-二脱氧-4,6-O-(苯基亚甲基)-3-C-苯磺酰基-α-D-赤-己基-2-烯吡喃糖苷(5α)和甲基2,3-二脱氧-4,6- O-(苯基亚甲基)-3-C-苯基磺酰基-β-D-赤型-己基-2-烯吡喃糖苷(5 beta)已与多种胺进行迈克尔加成反应,从而开发出一种用于合成新型氨基糖的新方法。化合物5α与伯胺反应生成葡萄糖衍生物,但仲胺同时生成葡萄糖(主要)和甘露(次要)异构体。另一方面,化合物5β仅产生具有伯胺和仲胺的葡糖异构体。将一些胺添加到5α和5β的立体化学过程与将胺添加到3-硝基吡喃糖中的立体化学过程显着不同。