Efficient Synthesis of Tetraacetylglycoluril in the Presence of Phosphorus-Containing Catalysts
作者:A. A. Bakibaev、S. Yu. Panshina、N. F. Hoang、D. A. Kurgachev、A. E. Ukhov、V. S. Malkov、K. B. Zhumanov
DOI:10.1134/s1070428021010085
日期:2021.1
Abstract The effect of phosphorus-containing catalysts, namely phosphorous acid, phosphoric acid, diethyl hydrogen phosphite, and 1-hydroxyethane-1,1-diyldiphosphonic acid (HEDP), in the synthesis of tetraacetylglycoluril by acylation of glycoluril with acetic anhydride at 140°C has been studied. The use of 4 equiv of phosphorous or phosphoric acid with respect to glycoluril has been found to be the most
摘要 含磷催化剂,即亚磷酸,磷酸,亚乙基二亚磷酸氢盐和1-羟基乙烷-1,1-二基二膦酸(HEDP)在140°C下通过将甘醇脲与乙酸酐酰化合成四乙酰基甘脲醇中的作用已经研究过了。已发现相对于甘脲,使用4当量的亚磷酸或磷酸是最适合获得最大收率(95-98%)的方法,HEDP的特殊作用会导致底物的N-乙酰化-脱乙酰化。磷酸对四乙酰基甘脲的形成的积极影响可能不仅与它们的催化作用有关,而且与溶解底物的能力有关。