Mechanism of the Reaction of Amines with 5-[(Aryl- or Alkylamino)hydroxymethylene]-2,2-dimethyl-1,3-dioxane-4,6-diones in the Presence of Chlorotrimethylsilane (Me<sub>3</sub>SiCl)
作者:Karolina Janikowska、Sławomir Makowiec、Janusz Rachoń
DOI:10.1002/hlca.201200326
日期:2013.5
3‐dioxane‐4,6‐dione of type 1 and a secondary amine as nucleophile strongly accelerated the rate of their reaction. The reason for this phenomenon observed, during our previous research, remained, however, unclear. To elucidate the mechanism of this reaction, we assumed and verified three possible pathways for the action of Me3SiCl (cf. Scheme 2): The acceleration of the reaction is caused i) by formation of
将氯三甲基硅烷(Me 3 SiCl)添加到氨基甲酰基取代的麦德鲁姆酸的混合物中,即5-[[(芳基氨基)羟基亚甲基] -2-,2-二甲基-1,3-二恶烷-4,6-二酮1型胺和仲胺作为亲核试剂强烈地促进了它们的反应速度。然而,在我们之前的研究中,仍观察到这种现象的原因尚不清楚。为了阐明该反应的机制,我们假定和验证三种可能的途径为我的动作3的SiCl(参见方案2):该反应的加速度引起我通过形成的)Ô -trimethylsilylated麦德鲁姆2的酸,ii)被甲硅烷基化的胺3所取代,或iii)在从Me 3 SiCl中释放出的HCl的存在下。进行的实验表明,更快的反应过程是由3型N-三甲基甲硅烷基化胺的形成引起的。