Organolithiums add smoothly to the N=N bond of azobenzenes at -78°C to give the lithium derivative of the trisubstituted hydrazine. The corresponding trisubstituted hydrazines, or a variety of unsymmetrically tetrasubstituted hydrazines, were thus conveniently prepared in high yielding one-pot procedures by direct quench, or by treatment of the reaction mixture with an alkyl iodide prior to workup.
有机锂在 -78°C 温度下与
偶氮苯的 N=N 键顺利结合,生成三取代
肼的
锂衍
生物。因此,相应的三取代
肼或各种不对称的四取代
肼都可以通过直接淬火或在工作前用烷基
碘化物处理反应混合物的方法,方便地在高产率的一锅程序中制备出来。