Michael additions of hydrazones for carbon–carbon bond formation
作者:Jack E. Baldwin、Robert M. Adlington、Jeffrey C. Bottaro、Ashok U. Jain、Jayant N. Kolhe、Matthew W. D. Perry、Ian M. Newington
DOI:10.1039/c39840001095
日期:——
The lithium salts of t-butyl-and trityl-hydrazones react with methyl crotonate to form C-trapped azo-esters and similar products were observed from a thermal ene-reaction of aldehyde t-butylhydrazones with methyl acrylate or acrylonitrile, and aldehyde phenylhydrazones with methyl acrylate; these products can be diverted into synthetically useful γ-keto-esters, γ-keto-nitriles, saturated esters, γ
On the reactions of benzeneseleninic anhydride with monosubstituted hydrazones. Evidence for radical pathways.
作者:Derek H.R. Barton、Takashi Okano、Shyamal I. Parekh
DOI:10.1016/s0040-4020(01)96097-1
日期:1991.3
The known oxidation of mono-substituted hydrazones by benzeneseleninicanhydride has been studied using 77Se and 13C NMR spectroscopy. The intermediates in the reaction have been identified. Good evidence that certain steps in these reactions are radical in character has been secured.
使用77 Se和13 C NMR光谱研究了已知的苯硒酸酐对单取代的氧化反应。已经确定了反应中的中间体。这些反应中某些步骤本质上是激进的,已经得到了充分的证据。
.alpha.-ISOCYANATO AND .alpha.-ISOTHIOCYANATO AZOS AND THEIR DERIVATIVES
申请人:Pennwalt Corporation
公开号:US04028344A1
公开(公告)日:1977-06-07
Azoalkanes of the formula ##STR1## WHERE Z is isocyanate or isothiocyanate or derivatives thereof, such as 1-t-butylazo-1-isothiocyanatocyclohexane, which are useful as foaming agents for polyester resins and as free radical initiators for vinyl monomers.