Monosaccharides. Communication 5. Behavior of some monosaccharide derivatives in reaction with triphenyl phosphite methiodide
作者:N. K. Kochetkov、A. I. Usov
DOI:10.1007/bf00849671
日期:1963.7
The reaction of carbohydrates with triphenyl phosphite methiodide and related compounds
作者:N.K. Kochetkov、A.I. Usov
DOI:10.1016/s0040-4020(01)99352-4
日期:1963.1
related compounds are proposed as reagents for replacing hydroxyls of protected carbohydrates by halogen atoms. The ease of the substitution reaction depends on steric accessibility of the hydroxyl to an SN2 attack. Isopropylidene and benzylidene as well as ester protective groupings can migrate under the reaction conditions; possible mechanisms of these migrations are discussed. As a result, a new route
提出了亚磷酸三苯酯甲硫醇和相关化合物作为用卤素原子代替被保护的碳水化合物的羟基的试剂。取代反应的难易程度取决于羟基对S N 2攻击的空间可及性。异亚丙基和亚苄基以及酯保护基团可以在反应条件下迁移。讨论了这些迁移的可能机制。结果,已经开发了从部分甲基化或甲苯磺酸化的单糖开始的脱氧糖的新途径。