Click Reaction of Selenols with Isocyanates: Rapid Access to Selenocarbamates as Peroxide‐Switchable Reservoir of Thiol‐Peroxidase‐Like Catalysts
作者:Antonella Capperucci、Alessandra Petrucci、Cristina Faggi、Damiano Tanini
DOI:10.1002/adsc.202100611
日期:2021.9.7
nucleophiles, isocyanates selectively couple with selenols. Selenocarbamates exhibited thiol-peroxidase-like properties, enabling the reduction of hydrogen peroxide at the expense of thiols, which are converted into the corresponding disulfides. A series of control experiments suggested that the catalytic mechanism proceeds through a pathway, involving a H2O2-promoted transcarbamoylation reaction leading
硒醇在温和的无催化剂条件下与异氰酸酯反应,以良好的收率和高选择性生成硒代氨基甲酸酯,而不是潜在的竞争亲核加成。该方法能够结合多种官能团,从而提供对广泛的密集官能化硒代氨基甲酸酯的访问。在竞争性以杂原子为中心的亲核试剂存在下,异氰酸酯选择性地与硒醇偶联。硒氨基甲酸酯表现出类似硫醇过氧化物酶的特性,能够以硫醇为代价还原过氧化氢,硫醇被转化为相应的二硫化物。一系列控制实验表明催化机制通过一个途径进行,涉及 H 2 O 2- 促进氨基甲酰化反应,产生硫代氨基甲酸酯,同时释放具有催化活性的硒酸阴离子。通过过氧化物驱动的硫醇 - 硒醇交换,硒代氨基甲酸酯表现为具有硫醇过氧化物酶样活性的硒酸阴离子的等价物。