Preparation of 2,5-Anhydrohexitols (Part Ii). Intramolecular Nucleophilic Substitution of Cyclic Sulfates
作者:Floris L. van Delft、A. Rob、P.M. Valentijn、Gijs A. van der Marel、Jacques H. van Boom
DOI:10.1080/07328309908543990
日期:1999.1.1
4-di-O-benzyl-5,6-O-cyclic sulfates 5, 16 and 25, derived from D-arabinose, D-ribose and D-xylose, respectively, are useful precursors in the synthesis of 2,5-anhydrohexitols. 5-Exo-tet cyclization of compounds 5, 16, and 25 under the influence of base leads to the predominant or exclusive formation of the corresponding tetrahydrofuran derivatives
2- ø -乙酰基3,4-二- ø -苄基-5,6- ø -环状硫酸酯5,16和25,从d-阿拉伯糖,d核糖和d木糖衍生的,分别是有用的前体在2,5-脱水己糖醇的合成中。5-外型- TET化合物环化5,16,和25基极引线的至主要或相应的四氢呋喃衍生物的独家形成的影响下