We have developed a novel method to synthesize α-diazoesters from α-hydrazonoesters with a catalytic amount of Cu(OAc)2 in acetonitrile. When the reaction was carried out under an argon atmosphere, the reaction stopped halfway, suggesting that this reaction required oxygen to reoxidize the catalyst. Since hydrazonoesters can be obtained by reduction of α-diazoesters with P(n-Bu)3 in diisopropyl ether
我们开发了一种在
乙腈中催化量的 Cu(OAc) 2由 α-
肼酯合成 α-重氮酯的新方法。当反应在
氩气氛下进行时,反应中途停止,表明该反应需要
氧气来重新氧化催化剂。由于可以通过在二
异丙醚中用 P( n - Bu) 3还原 α-重氮酯来获得
肼酯,因此这两种化合物很容易相互转化。α-重氮酯不稳定且不适合储存,而
肼酯更稳定,尤其是结晶
肼酯。因此,适合长期储存的腙酸酯可以方便地用作α-重氮酯的前体。