1,3,4,6-tetracarbonyl compounds. part 2. 1 synthesis of biologically active 2-hydroxy-2,3-dihydro-3-pyrrolones and substituted amides of aroylpyruvic acids
作者:E. N. Koz'minykh、N. M. Igidov、E. S. Berezina、G. A. Shavkunova、I. B. Yakovlev、S. A. Shelenkova、V. É. Kolla、É. V. Voronina、V. O. Koz'minykh
DOI:10.1007/bf02219683
日期:1996.7
acetoacetic, and cyanoacetic esters readily interact with 5-aryl2,3-dihydro-2,3-furandiones (I) in the presence of base catalysts with the formation of 2-aeylmethyl-2-hydroxy2,3-dihydro-3-furanones-stable products of regioselective aldol condensation at the lactone carbonyl [1 7]. It was established that these cyclic semiacetals occur in solution in equilibrium with linear oxotautomeric forms, enolyzed at
众所周知,CH 酸如芳甲基酮、乙酰乙酸和氰乙酸酯在碱催化剂存在下很容易与 5-芳基 2,3-二氢-2,3-呋喃二酮 (I) 相互作用,形成 2-芳基甲基-2-羟基2,3-二氢-3-呋喃酮-内酯羰基区域选择性羟醛缩合的稳定产物[1 7]。已确定这些环状半缩醛在溶液中以平衡的形式存在,具有线性氧化异构形式,在 3 和 4 位的羰基处被烯醇化,并与 1,3,4,6-四羰基化合物 [I, 3, 5 -7] 一起存在。后一种化合物和闭环杂官能衍生物的结构,以及它们在溶液中的互变异构平衡,已经得到了足够详细的研究 [1, 3, 8 12]。