Stereocontrolled construction of tetrasubstituted tetrahydrofurans: synthesis of 2,5-anhydro d-glucitol
作者:Biswanath Das、Duddukuri Nandan Kumar
DOI:10.1016/j.tetlet.2010.09.049
日期:2010.11
A highly stereoselective construction of 2,3,4,5-tetrasubstituted tetrahydrofurans has been accomplished by an unusual intramolecular 5-endo-tet cyclization of 2,3-epoxy alcohols involving hydroxyl nucleophile. The method has been utilized for the synthesis of 2,5-anhydro d-glucitol through two different approaches starting from the chiral molecule, l(+)-diethyl tartarate or from the non-chiral compound
2,3,4,5-四取代的四氢呋喃的高度立体选择性构建是通过涉及羟基亲核试剂的2,3-环氧醇的不寻常的分子内5-内-tet环化完成的。该方法已通过两种不同的方法从手性分子l(+)-二乙基酒石酸酯或从非手性化合物烯丙基溴或顺-丁-2开始用于合成2,5-脱水d-葡萄糖醇-烯-1,4-二醇。该合成方法是2,3-环氧醇的5-内-tet环化的有用实例。