The title compounds were synthesized by addition of 2,3,4,6-tetra-O-benzyl-d-glucono-1,5-lactone to epoxides and by direct dehydration between the lactone and diols in the presence of concentrated sulfuric acid as a catalyst. Stereochemistry of these spiro cyclic acetals was discussed.
标题化合物是通过将2,3,4,6-四-O-苄基-d-
葡萄糖酸内酯添加到
环氧化物中以及在浓
硫酸催化下,直接脱
水内酯与二醇之间的反应合成的。讨论了这些螺
环醚的立体
化学。