Several Convenient Methods for the Synthesis of 2-Amido Substituted Furans
作者:Albert Padwa、Kenneth R. Crawford、Paitoon Rashatasakhon、Mickea Rose
DOI:10.1021/jo026757l
日期:2003.4.1
Several new methods for the synthesis of differently substituted 2-amidofurans are described. The thermolysis of furan-2-carbonyl azide results in a Curtius rearrangement and the resulting furanyl isocyanate was trapped with various organometallic reagents. A second method consists of a C-N cross-coupling reaction of a bromo-substituted furan with various amides, carbamates, and lactams. The CuI-catalyzed
Cooperation of a Reductant and an Oxidant in One Pot To Synthesize Amides from Nitroarenes and Aldehydes
作者:Wei Zhang、Guozhu Sheng、Xia Wu、Xiuhua Cai
DOI:10.1055/s-0034-1380111
日期:——
their cooperation. The reductant zinc powder and the oxidant sodium chlorate were used together in an appropriate ratio in onepot under ambient conditions, to provide an environmentally friendly, effective, and convenient method for the synthesis of aromatic amides in good yields from nitroarenes and aldehydes in the green solvents alcohol and water under atmospheric conditions. The good results indicate
<i>N</i>-Amidation by Copper-Mediated Cross-Coupling of Organostannanes or Boronic Acids with <i>O</i>-Acetyl Hydroxamic Acids
作者:Zhihui Zhang、Ying Yu、Lanny S. Liebeskind
DOI:10.1021/ol8009682
日期:2008.7.17
A general nonoxidative N-amidation of organostannanes and boronic acids has been developed. Under nonbasic conditions a wide variety of aryl, alkenyl, and heteroaryl organostannanes and boronic acids couple efficiently with O-acetyl hydroxamic acids in the presence of Cu(I) sources.