异蔗糖和烯丙醇的酸催化反应

Reaction of Isomaltulose with Allyl Alcohol Catalysed by Acid

异蔗糖和烯丙醇在盐酸催化作用下的反应不生成对应的烯丙苷，而得到由降解副产物５（αＤ吡喃葡萄糖基甲基）２呋喃甲醛（３ａ），α，βＤ吡喃葡萄糖烯丙苷（４ａ）和５（烯丙氧基甲基）２呋喃甲醛（５）组成的混合物。该混合物经乙酰化反应得化合物５（２，３，４，６四Ｏ乙酰基αＤ吡喃葡萄糖基甲基）２呋喃甲醛（３ｂ），２，３，４，６四Ｏ乙酰基α，βＤ吡喃葡萄糖烯丙苷（４ｂ）和５（烯丙氧基甲基）２呋喃甲醛（５）。

The reaction of isomaltulose with allyl alcohol catalysed by HCl gave no allyl isomaltuloside,but a mixture of the degradation by products 5 (α D glucopyranosyloxmethyl) 2 furancarboxaaldehyde (3a),allyl α,β D glucopyranoside (4a)and 5 (allyloxmethyl) 2 furancarboxaaldehyde(5).The mixture was acetylated to afford a mixture of compounds 5 (2,3,4,6 tetra O acetyl α D glucopyranosyloxmethyl) 2 furancarboxaaldehyde(3b),allyl 2,3,4,6 tetra O acetyl α,β D glucopyranoside (4b) and 5 (allyloxmethyl) 2 furancarboxaaldehyde (5).