Synthesis of (2-Ethoxy-2-oxoethylthio)methyl Derivatives of Furoic Acids and Attempts of Their Intramolecular Cyclizations under the Conditions of the Claisen Reaction
作者:L. M. Pevzner、N. P. Stepanova
DOI:10.1134/s1070363220020024
日期:2020.2
AbstractBased on reactions of phosphorylated derivatives of halomethylfuroic acid esters with thioglycolic acid ester in the presence of bases, a method for the synthesis of mono-and bisphosphosphorylated esters of (2-ethoxy-2-oxoethylthio)methyl derivatives of furoic acids, containing an ester group in the position adjacent to the sulfide moiety was developed. Obtained compounds are relatively easily
摘要基于卤代甲基糠酸酯的磷酸化衍生物与巯基乙酸酯在碱的存在下的反应,一种合成糠酸酯的(2-乙氧基-2-氧代乙硫基)甲基衍生物的单酯和双磷酸酯化的酯的方法,该酯含有在与硫化物部分相邻的位置上形成了基团。获得的化合物相对容易用叔丁醇钾金属化,但是分子内环化仅在5-(二乙氧基磷酰基甲基)-2-(乙氧基羰基甲基硫代甲基)呋喃-3-甲酸的情况下才能顺利进行。生成的7 H-硫代吡喃并[3,4- b ]呋喃的1,3-二羰基衍生物水解不稳定,但其烯醇为O-甲醚是稳定的。研究了后一种化合物的碱性水解,结果表明它在酯以及膦酸酯基团上进行。