Coupling of anhydro-aldose tosylhydrazones with hydroxy compounds and carboxylic acids: a new route for the synthesis of C-β-<scp>d</scp>-glycopyranosylmethyl ethers and esters
作者:Tímea Kaszás、Marietta Tóth、Sándor Kun、László Somsák
DOI:10.1039/c6ra27282g
日期:——
tosylhydrazones) with alcohols, phenols, and carboxylic acids were studied under thermic or photolytic conditions in the presence of K3PO4 or LiOtBu. The reactions failed with EtOH, BnOH, or tBuOH, however, (CF3)2CHOH, electron poor phenols and carboxylic acids gave the corresponding C-β-D-glycopyranosylmethyl ethers and esters, respectively, representing a new access to these glycomimetic compounds.
在K 3 PO 4存在下,在热或光解条件下研究了O-过酰化的2,6-脱水醛糖甲苯磺酰yl(C-(β- D-甘露糖基)甲醛甲苯磺酰to)与醇,酚和羧酸的交叉偶联。或LiO t Bu。用EtOH,BnOH或t BuOH可使反应失败,但是,(CF 3)2 CHOH,电子贫乏的酚和羧酸分别产生相应的C- β- D-糖基核糖基甲基醚和酯,代表了使用这些糖模拟物的新途径化合物。