noble-metal-free oxidative cyclization of enamines and tBuONO has been developed. This KI-mediated formal [4 + 1] cycloamination reaction provides a practical strategy for the synthesis of imidazole-4-carboxylic derivatives using tBuONO both as an aminating reagent and oxidant. The reaction features wide substrate scope and good functional tolerance for enamine compounds, even the unactivated ones.
开发了一种用于烯胺和t BuONO的无贵金属氧化环化的简单方案。这种 KI 介导的形式 [4 + 1] 环胺化反应为使用t BuONO 作为胺化试剂和氧化剂合成咪唑-4-羧酸衍生物提供了实用策略。该反应具有广泛的底物范围和对烯胺化合物良好的功能耐受性,即使是未活化的。