Ring Opening of Organosilicon-Substituted Benzoxazolinone: A Convenient Route to Chelating Ureato and Carbamido Ligands

N-Silylated benzoxazolin-2-one reacts with N−H and C−H acidic heterocycles (benzoxazolinone, 3,5-dimethylpyrazole, N-methylimidazole) under benzoxazolinone ring cleavage and formation of ortho-siloxyphenyl-substituted ureas and carbamides, respectively. These products were shown to serve as sources for tridentate (O′NO) and (N′NO) chelating ligands.

N-硅基化苯并恶唑啉-2-酮（N-Silylated benzoxazolin-2-one）可与N-H酸性及C-H酸性杂环（苯并恶唑啉酮（benzoxazolinone）、3,5-二甲基吡唑（3,5-dimethylpyrazole）、N-甲基咪唑（N-methylimidazole））发生反应，反应伴随苯并恶唑啉酮环的裂解，分别生成邻硅氧苯基取代的脲类与氨基甲酰类化合物。研究表明，此类产物可作为三齿(O′NO)及(N′NO)螯合配体的来源。