Copper‐Catalyzed Amidation of Primary and Secondary Alkyl Boronic Esters
作者:Luis M. Mori‐Quiroz、Kirk W. Shimkin、Sina Rezazadeh、Ryan A. Kozlowski、Donald A. Watson
DOI:10.1002/chem.201603677
日期:2016.10.24
The oxidative copper‐catalyzed cross‐coupling of functionalized alkyl boronic esters with primary amides is reported. Through the identification of appropriate diketimine ligands, conditions for efficient coupling of both primary and secondaryalkyl boronic esters with diverse primary amides, including acetamide, have been developed.
Efficient catalyst-free direct amidation of non-activated carboxylic acids from carbodiimides
作者:Mehmet Mart、Janusz Jurczak、Idris Karakaya
DOI:10.1039/d2ob01322c
日期:——
A novel and efficient catalyst- and activating agent-free amidationmethod via direct amidation of carboxylic acids where carbodiimides act as a reagent instead of an activating agent is reported. The reaction is conducted under non-traditional coupling conditions where a higher temperature is employed. Besides not using stoichiometric ratios of activating agent or catalyst, this approach is made even