2-Phenyliminomethylphenols, 2-phenylaminomethylphenols and their copper(II) complexes
作者:H.J. Harries、B.F. Orford、J. Burgess
DOI:10.1016/s0020-1693(00)88934-3
日期:1983.1
2-phenyliminomethylphenols (I) and 2-phenylaminomethylphenols (II) are described. Acid dissociation constants, determined potentiometrically, for the amines (II) are related to substituent constants; values are not obtained for Schiff bases(I) due to their hydrolysis. IR spectra of the amines (II) indicate chelate ring formation via OH⋯N hydrogen bonding. NMR spectra for Schiff bases (I) are consistent
p-chloroaniline) and formaldehyde to study influence of substituent on equilibrium of benzoxazine synthesis from Mannich base and formaldehyde. 1H-NMR and charges of nitrogen and oxygen atoms illustrate effect of substituent on reactivity of Mannich base, while oxazine ring stability is characterized by differential scanning calorimetry (DSC) and C–O bond order. Equilibrium constants were tested from 50 °C to
由取代的苯酚(对甲酚,苯酚,对氯苯酚),取代的苯胺(p)合成N-取代的氨基甲基苯酚(曼尼希碱)和3,4-二氢-2 H -3-取代的1,3-苯并恶嗪(苯并恶嗪)。-甲苯胺,苯胺,对氯苯胺)和甲醛,以研究取代基对曼尼希碱和甲醛合成苯并恶嗪平衡的影响。1个H-NMR和氮原子和氧原子的电荷说明了取代基对曼尼希碱反应性的影响,而恶嗪环的稳定性由差示扫描量热法(DSC)和C–O键顺序表征。在50°C至80°C的温度下测试平衡常数,结果表明,连接在苯酚或苯胺上的取代基对曼尼希碱的反应性具有相同的影响。但是,它对恶嗪环的稳定性和平衡常数有相反的影响。与苯酚-苯胺体系相比,苯酚或苯胺上的供电子甲基增加了曼尼希碱中氮和氧原子的电荷。当甲基位于苯酚的对位时,恶嗪环的稳定性增加,平衡常数上升,而当甲基位于苯酚的对位时。苯胺的对位上,恶嗪环的稳定性降低,苯并恶嗪易于发生水解,平衡常数很低。
Noda, Nippon Kagaku Zasshi, 1959, vol. 80, p. 321,324
作者:Noda
DOI:——
日期:——
KOMATSUBARA, TSUTOMU;TONOGAI, SABURO;TAKAHASHI, AKIO, SCI. AND IND., 61,(1987) N 9, 367-371