HEINISCH, L., J. PRAKT. CHEM., 330,(1988) N 1, 57-64
作者:HEINISCH, L.
DOI:——
日期:——
Synthesis and reactions of some nitrone derivatives
作者:Orazio A Attanasi、Paolino Filippone、Chiara Fiorucci
DOI:10.1016/s0040-4020(96)01081-2
日期:1997.1
nucleophiles with conjugated azoalkenes to give α-(arylimino-N-oxide)hydrazones by their 1,4-addition to the azo-ene system. These adducts undergo an internal heterocyclization process with pyrazole ring formation to produce 1-alkoxycarbonyl- or 1-aminocarbonyl-3-methyl-4-(arylimino-N-oxide)-1H-pyrazol-5(4H)-ones stereoselectively in Z form by loss of an alcohol molecule. Deoxygenation of these compounds with