作者:Susan F. Kobs、Edward J. Behrman
DOI:10.1016/s0020-1693(00)81192-5
日期:1987.10
Abstract We have studied the reactions of imidazoles with osmium tetroxide both in the presence and absence of ligands other than imidazoles. The pathway involves: (1) osmium tetroxide-ligand complexation (fast), (2) addition of osmium tetroxide to the 4,5-double bond of the imidazole to form the cyclic osmium(VI) ester (slow), and (3) degradation of the osmate ester via ring cleavage of the 4,5-d
摘要我们研究了在存在和不存在咪唑以外的其他配体的情况下,咪唑与四氧化os的反应。该途径涉及:(1)四氧化os-配体络合(快速),(2)将四氧化加到咪唑的4,5-双键上形成环状(VI)酯(慢),和(3 )通过4,5-二羟基二氢咪唑的开环裂解来降解osmate酯(非常慢)。我们报告动力学数据为双键作为咪唑结构的函数。最终产物是4,5-二羟基二氢咪唑的osmate(VI)酯,其中两个咪唑分子(或其他配体)占据了其余的配位位点。我们提供了仅包含一种这样的配体的中间体的动力学和化学证据。