作者:N.A. Evans、D.J. Whelan、R.B. Johns
DOI:10.1016/s0040-4020(01)96956-x
日期:1965.1
Structure (I) is shown to be the correct formulation for the compound hitherto considered to be the “azine” of ethyl acetoacetate; I rearranges to IV. Both IV, 1(H)-3-methyl, and 1(H)-3-phenyl, 5-pyrazolones and related compounds are shown to exist in the enolic form (VII) in the solid state and predominantly so in the solvents in which they are soluble. Similarly the indazolones are found to be represented
对于迄今为止被认为是乙酰乙酸乙酯的“嗪”的化合物,结构(I)被证明是正确的配方;我重新安排到IV。IV,1(H)-3-甲基和1(H)-3-苯基,5-吡唑酮和相关化合物均以固态存在,且主要存在于溶剂中,呈烯醇式(VII)形式存在。它们是可溶的。类似地,发现吲唑酮仅由烯醇化的结构XII代表。根据光谱数据,在必要时重新配制了两个系列的乙酸盐,并且IR中发现的羰基基团的高频率显示出与杂环的π电子没有共轭。