The insertion reaction of isocyanides with thiocarbamates and selenocarbamates in the presence of a Pd(0) catalyst to selectively give 2-oxoethanimidothioates and -selenoates is reported. This is the first example of the insertion of an isocyanide into a carbon–heteroatom bond using a transition-metal catalyst. DFT calculations suggest that the reaction proceeds through a thiopalladation pathway at the migratory insertion process.
报道了一种在Pd(0)催化剂存在下,异
氰与
硫代
氨基甲酸酯及
硒代
氨基甲酸酯反应,选择性生成2-氧代亚乙基
亚胺硫羧酸酯和
硒羧酸酯的插入反应。这是首次利用过渡
金属催化剂实现异
氰插入碳-杂原子键的实例。密度泛函理论计算表明,该反应在迁移插入过程中通过
硫配位
钯化途径进行。