Palladium-Catalyzed Oxidative <i>N</i>-Dealkylation/Carbonylation of Tertiary Amines with Alkynes to α,β-Alkynylamides
作者:Rajendra S. Mane、Bhalchandra M. Bhanage
DOI:10.1021/acs.joc.6b00386
日期:2016.6.17
The first highly effective Pd/C-catalyzed oxidative N-dealkylation/carbonylation of various aliphatic as well as cyclic tertiaryamines with alkynes has been described. The selective sp3 C–N bond activation of tertiaryamines at the less steric side using O2 as a sole oxidant and a plausible reaction pathway for the reaction are discussed. The general and operationally simple methodology provides an
Dual Hypervalent Iodine(III) Reagents and Photoredox Catalysis Enable Decarboxylative Ynonylation under Mild Conditions
作者:Hanchu Huang、Guojin Zhang、Yiyun Chen
DOI:10.1002/anie.201502369
日期:2015.6.26
combination of hypervalentiodine(III) reagents (HIR) and photoredoxcatalysis with visible light has enabled chemoselective decarboxylativeynonylation to construct ynones, ynamides, and ynoates. This ynonylation occurs effectively undermild reaction conditions at room temperature and on substrates with various sensitive and reactive functional groups. The reaction represents the first HIR/photoredox dual
Copper-Catalyzed Amidation of Acids Using Formamides as the Amine Source
作者:Ye-Xiang Xie、Ren-Jie Song、Xu-Heng Yang、Jian-Nan Xiang、Jin-Heng Li
DOI:10.1002/ejoc.201300543
日期:2013.9
Copper-catalyzedamidation of acids with formamides or acetamide for the selective synthesis of amides with the aid of 1,4-diazabicyclo[2.2.2]octane as the ligand and tert-butyl hydroperoxide as the oxidant is presented. This method is highly compatible with a wide range of acids, including alkyl acids, aryl acids, α,β-unsaturated acids, and amino acids.
A highly efficient, two-step, one-pot synthetic strategy for amides and peptides was developed by employing ynamides as novel couplingreagents under extremely mild reaction conditions. The ynamides not only are effective for simple amide and dipeptide synthesis but can also be used for peptide segment condensation. Importantly, no racemization was detected during the activation of chiral carboxylic