Isomerism and lead(IV) acetate oxidation reactions of p-substituted phenylosazones of some substituted glyoxals and 1,2-diketones. Reactions of metallic acetates with nitrogen compounds. Part 5.
作者:Richard N. Butler、Michael G. Cunningham
DOI:10.1039/p19800000744
日期:——
bis-(p-bromophenyl)hydrazones of phenylglyoxal, which were obtained as the E,Z-chelate forms. Unstable yellow crystalline forms of the bis-(pnitrophenyl)hydrazones of glyoxal, butane-2,3-dione, and benzil containing two molecules of hexamethylphosphoramide (HMPA) of crystallisation, which may contain the E,Z-isomers, were isolated from HMPA solutions. Lead tetra-acetate oxidation of a range of E,E-osazones
乙二醛,甲基乙二醛,苯基乙二醛,丁烷-2,3-二酮,苯甲酰和环己烷-1,2-二酮的双-(对-硝基苯基)hydr和一些双-(对-溴苯基)structures的结构通过ir,1 H nmr和13 C nmr光谱。通常,from的E,E形式是从直接合成中获得的,除了环己烷-1,2-二酮的双-(对-硝基苯基)hydr和苯基乙二醛和苯乙二醛的双-(对-溴苯基)hydr酮外,它们是Ë,ž-螯合物形式。从HMPA中分离出乙二醛,2,3-丁烷和丁二酮的双-(对硝基苯基)hydr的不稳定黄色结晶形式,其中含有两个结晶的六甲基磷酰胺(HMPA)分子,其中可能包含E,Z-异构体。解决方案。一系列的E,E -osa的四乙酸铅氧化使脱氢成为1,2-双偶氮乙烯。E,Z -osa的相似氧化主要产生2-芳基-1,2,3-三唑类产物(osotriazoles),同时偶氮乙烯的产率较低。环己烷-1,2-二酮双-(对硝基苯基)