Equilibrium between 4-acetoxypyridine and N-acetyl-4-pyridone; a correction of the literature
作者:Ian Fleming、D. Philippides
DOI:10.1039/j39700002426
日期:——
The known compound, reported in the literature to be 4-acetoxypyridine, is shown to be N-acetyl-4-pyridone. In solution the two isomers are in equilibrium. 4-Pyridone is acetylated by acetic anhydride more rapidly and more completely than is 2-pyridone.
Proton and carbon nuclear magnetic resonance study on some n- and o-acyl derivatives of monohydroxypyridines
作者:M.R. Del Giudice、G. Settimj、M. Delfini
DOI:10.1016/0040-4020(84)85087-5
日期:1984.1
Comparative study on the proton and carbon NMR spectra for a series of N- and O-acyl substituted monohydroxypyridines (C5H4NOR: R=-H, -CHO, -COCH3, -COC(CH3)3, -COCF3, -COC6H5, -SO2CH3, -SO2C6H4CH3 is reported. p]Characteristic 1H, 13 NMR and IR spectral features allow simple and unambiguous distinction between the isomeric N- and/or O-acyl-derivatives of 2-, 3- and 4-hydroxypyridines, so that both
一系列N和O-酰基取代的单羟基吡啶(C 5 H 4 NOR:R = -H,-CHO,-COCH 3,-COC(CH 3)3,-COCF的质子和碳NMR光谱的比较研究报道了3,-COC 6 H 5,-SO 2 CH 3,-SO 2 C 6 H 4 CH 3 [ p]特性1 H,13 NMR和IR光谱特征可对2-,3-和4-羟基吡啶的同分异构的N-和/或O-酰基衍生物进行简单而明确的区分,因此,由于互变异构,当互变异构发生平衡时,两种形式都可以清楚地鉴定出来。速度在NMR时间尺度上很慢
Synthesis of 4-Oxo-1,2,3,4-tetrahydropyridine (2,3-Dihydro-4(1H)pyridinone)
作者:Akhtar Haider、Georges Cornuz、Hugo Wyler
DOI:10.1002/hlca.19750580507
日期:1975.7.16
N-Ethoxycarbonyl-4-pyridone is reduced to N-ethoxycarbonyl-4-oxo-1, 2, 3, 4-tetrahydropyridine by sodium borohydride in t-butyl alcohol containing ethyl chloroformate. Saponification of the product leads to 4-Oxo-1, 2, 3, 4-tetrahydropyridine.