Nickel-catalyzed monofluoromethylation of (hetero)aryl bromides <i>via</i> reductive cross-coupling
作者:Han Yin、Jie Sheng、Kai-Fan Zhang、Zi-Qi Zhang、Kang-Jie Bian、Xi-Sheng Wang
DOI:10.1039/c9cc03737c
日期:——
A mild and efficient nickel-catalyzed direct monofluoromethylation of (hetero)aryl bromides by reductive cross-coupling has been developed. This method exhibits good efficiency, wide functional-group compatibility, and suitability for aryl and heteroaryl bromides with abundant industrial raw material BrCH2F. This strategy provides an efficient way to synthesize monofluoromethylated molecules for drug
Carbofluorination via a palladium-catalyzed cascade reaction
作者:Marie-Gabrielle Braun、Matthew H. Katcher、Abigail G. Doyle
DOI:10.1039/c2sc22198e
日期:——
This article demonstrates the first examples of tandem C–C and C–F bond formation for the palladium-catalyzed carbofluorination of allenes. The intramolecular Heck-fluorination cascade provides monofluoromethylated heteroarenes, an important class of products in medicinal chemistry. We also describe an intermolecular variant for the three-component coupling of allenes, aryl iodides, and AgF. Mechanistic studies indicate that C–F bond formation occurs by outer sphere attack of fluoride on an allylpalladium fluoride intermediate.