Synthesis and solution structure of 3,5-dioxopimelic acid diesters—stable 1,3,5,7-tetracarbonyl derivatives
作者:Stefanie Reim、Dirk Michalik、Klaus Weisz、Zhou Xiao、Peter Langer
DOI:10.1039/b805808c
日期:——
A variety of 3,5-dioxopimelic acid diesters, stable 1,3,5,7-tetracarbonyl derivatives, were prepared by catalytic condensation of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with methyl malonyl chloride. The ketoâenol tautomerization of these compounds has been investigated by NMR spectroscopy. One keto and up to four enolic tautomers could be detected in chloroform solution and the influence of the substituents on the tautomeric equilibria has been studied.
通过1,3-双(三甲基硅氧基)-1,3-丁二烯与甲基丙二酰氯的催化缩合反应,制备了一系列稳定的3,5-二氧代庚二酸二酯1,3,5,7-四羰基衍生物。利用核磁共振光谱研究了这些化合物的酮-烯醇互变异构现象。在氯仿溶液中,可以检测到一个酮式异构体和多达四个烯醇式异构体,并研究了取代基对互变异构平衡的影响。