Oxidation of Methyl α-D-Glucopyranoside and Some Related Compounds Catalysed by Nickel Peroxide
作者:E. J.M. Mombarg、A. Abbadi、F. van Rantwijk、H. van Bekkum
DOI:10.1080/07328309608005671
日期:1996.7
(R)-2-O-[(R)-carboxylato(methoxy)methyl]erythrate. Subsequently oxidation to disodium (R)-2-O-[(R)-carboxylato(methoxy)methyl]glycerate took place. β-Cyclodextrin was preferentially oxidatively cleaved (ca. 50%) between the C(2)-C(3) carbons, although oxidation at the C(6) carbon (ca. 25%) appeared to occur as well. In contrast, maltodextrin was oxidised at the primary hydroxyl functions.
硫酸镍使用次氯酸钠作为主要氧化剂,可有效催化氧化乙二醇的裂解。悬浮的过氧化镍被认为是活性中间体。在8 <0.2:1的次氯酸盐:镍:二醇的摩尔比下,在pH <10和20°C下,将2,3-丁二醇氧化(转化率为95%)为乙酸盐。首先将甲基α-D-吡喃葡萄糖苷氧化为(R)-2- O -[(R)-羧甲基(甲氧基)甲基]季戊二酸二钠。随后氧化为(R)-2- O -[(R)-羧基(甲氧基)甲基]甘油酯发生。尽管在C(6)碳(约25%)处也发生了氧化,但β-环糊精在C(2)-C(3)碳之间被优先氧化裂解(约50%)。相反,麦芽糖糊精在伯羟基官能团上被氧化。