Formation of cyclic carbonates in the reactions of 1,2-glycols with oxalyl chloride.
作者:Taisuke ITAYA、Takehiko IIDA、Hiromi EGUCHI
DOI:10.1248/cpb.41.408
日期:——
Oxalyl chloride reacts with a wide range of 1, 2-glycols in the presence of triethylamine to produce 1, 3-dioxolan-2-ones together with 1, 4-dioxane-2, 3-diones; the ratio of the products largely depends on the structure of the 1, 2-glycol. The formation of the cyclic carbonates may be rationalized in terms of stereoelectronically controlled cleavage of the tetrahedral intermediates.
草酰氯在三乙胺存在下与广泛的1, 2-二醇反应,生成1, 3-二恶烷-2-酮和1, 4-二恶烷-2, 3-二酮;产物的比例很大程度上取决于1, 2-二醇的结构。环状碳酸酯的形成可以用四面体中间体的手性电子控制断裂来合理化。