2-oxo-acetamidines from methyl ketones using aromatic amines and DMF as nitrogen sources is reported via copper-catalyzedC(sp3)–H amidination. Various methyl ketones react readily with aromatic amines and DMF, producing 2-oxo-acetamidines in yields of 47 to 92%. This protocol features the simultaneous formation of C–N and CN bonds using DMF and aromatic amines as two different nitrogen sources. It
Copper-Catalyzed CH Oxidation/Cross-Coupling of α-Amino Carbonyl Compounds
作者:Ji-Cheng Wu、Ren-Jie Song、Zhi-Qiang Wang、Xiao-Cheng Huang、Ye-Xiang Xie、Jin-Heng Li
DOI:10.1002/anie.201109027
日期:2012.4.2
indoles selectively furnishes 1 and 2 with the aid of tert‐butyl hydroperoxide (TBHP). The method represents the first example of a copper‐catalyzedα arylation of α‐amino carbonyl substrates leading to α‐aryl α‐imino and α‐aryl α‐oxo carbonyl compounds using a CH oxidation strategy.
A simple and efficient method for the synthesis of α-ketothioamides via the Willgerodt–Kindlerreaction is developed. Reactions were carried out between arylglyoxal hydrates, amines and elemental sulfur in water at 80°C to afford corresponding α-ketothioamides in good to high yields in a short reaction time.
containing heterocycles, primary or secondary amines, arylglyoxaldehydes, and anilines is reported. The key step involves a tandem sequence of N-1 addition of a heterocycle or an amine to preformed α-iminoketones, followed by an air- or oxygen-mediated oxidation to form α-oxo-acetamidines. The scope of the reaction is enticingly broad, and this novel methodology is applied toward the synthesis of various