Solvent-Accelerated Decarboxylation of <i>N</i>-Carboxy-2-imidazolidinone. Implications for Stability of Intermediates in Biotin-Dependent Carboxylations
作者:Jubrail Rahil、Shaochun You、Ronald Kluger
DOI:10.1021/ja962464w
日期:1996.1.1
by association of the substrate and protein. In addition, a report on the decarboxylation of N-carboxy-2-imidazolidinone in organic solvents containing macrocycles (Kluger, R.; Tsao, B. J. Am. Chem. Soc. 1993, 115, 2089−90) must be reinterpreted on the basis of the inherent instability of the substrate under the reaction conditions.
N-carboxy-2-imidazolidinone 的脱羧以前已被确立为从 N(1')-carboxybiotin 转移二氧化碳的模型。本论文报告了反应的 pH 依赖性以及在甲醇和乙腈中的反应加速。这些结果表明,如果去溶剂化的能量由底物和蛋白质的结合所提供的能量补偿,则 N(1')-羧基生物素在氢键减少的疏水活性位点中的酶促反应可能会很快。此外,一份关于 N-carboxy-2-imidazolidinone 在含有大环的有机溶剂中脱羧的报告 (Kluger, R.; Tsao, BJ Am. Chem. Soc. 1993, 115, 2089-90) 必须基于底物在反应条件下的固有不稳定性。