Reductive Fragmentation of Carbohydrate Anomeric Alkoxy Radicals. Synthesis of Alditols with Potential Utility as Chiral Synthons
作者:Cosme G. Francisco、Elisa I. León、Angeles Martín、Pilar Moreno、María S. Rodríguez、Ernesto Suárez
DOI:10.1021/jo0156565
日期:2001.10.1
A series of anomeric nitrate esters and N-phthalimido glycosides of carbohydrates in furanose and pyranose forms have been synthesized in order to generate the corresponding alkoxy radicals and study the C1-C2 fragmentation reaction under reductive conditions. This reaction constitutes a two-step method for the transformation of carbohydrates into the corresponding alditols with one less carbon. Using
合成了一系列呋喃糖和吡喃糖形式的碳水化合物的异头硝酸酯和N-邻苯二甲酰亚胺基糖苷,以生成相应的烷氧基,并研究还原条件下的C1-C2片段化反应。该反应构成了将碳水化合物转化为碳较少的相应糖醇的两步法。使用这种方法,已经制备了具有D-赤藓糖醇,D-苏糖醇,D-木糖醇和D-阿拉伯糖醇立体化学的天然产物合成的有趣的四碳和五碳构件。1,2-O-异亚丙基-β-L-苏糖(40)和1-乙酰氨基-2,4,5-三-O-乙酰基-D-阿拉伯糖醇(50)的合成也已从1,2实现:5,6-二-O-异亚丙基-β-D-呋喃葡萄糖和2-乙酰氨基-3,4,6-三-O-乙酰基-2-脱氧-D-吡喃葡萄糖,