P450-catalyzed asymmetric cyclopropanation of electron-deficient olefins under aerobic conditions
作者:Hans Renata、Z. Jane Wang、Rebekah Z. Kitto、Frances H. Arnold
DOI:10.1039/c4cy00633j
日期:——
A histidine-ligated variant of P450-BM3 catalyzes cyclopropanation of a variety of electron-deficient olefins under ambient conditions with great selectivity.
Palladium-Catalyzed Direct Intermolecular α-Arylation of Amides with Aryl Chlorides
作者:Bing Zheng、Tiezheng Jia、Patrick J. Walsh
DOI:10.1021/ol4019002
日期:2013.8.16
An efficient catalytic system for the direct intermolecularα-arylation of acetamide derivatives with aryl chlorides is presented. Chemoselectivities up to 10:1 in the mono- and diarylation of acetamides were achieved by careful selection of bases, solvents, and stoichiometry. Bis-arylated amides were prepared in up to 95% yield.
Practical synthesis of amides from alkynyl bromides, amines, and water
作者:Zheng-Wang Chen、Huan-Feng Jiang、Xiao-Yan Pan、Zai-Jun He
DOI:10.1016/j.tet.2011.06.045
日期:2011.8
A general and efficient method for the synthesis of a wide range of amides is described here. The reactions were conducted under convenient conditions and provided secondary and tertiary amides in moderate to excellent yields. A variety of amines and substituted alkynyl bromides were used to investigate the scope of the reactions. (C) 2011 Elsevier Ltd. All rights reserved.
Palladium-catalyzed synthesis of arylacetamides from arylboronic acids
作者:Ya-Zhen Duan、Min-Zhi Deng
DOI:10.1016/s0040-4039(03)00586-0
日期:2003.4
Aryl amides were synthesized by the palladium catalyzed cross-coupling reaction of alpha-bromoacetamides with arylboronic acids in good yields. Both electron-donating and electron-withdrawing substituents on the aromatic ring are found to be compatible. The addition of Cu2O and PPh3 was found to be essential for good reaction yields. (C) 2003 Elsevier Science Ltd. All rights reserved.
A General and Practical Palladium-Catalyzed Direct α-Arylation of Amides with Aryl Halides
作者:Bing Zheng、Tiezheng Jia、Patrick J. Walsh
DOI:10.1002/adsc.201300851
日期:2014.1.13
An efficient system for the direct catalytic intermolecular α‐arylation of acetamide derivatives with aryl bromides and chlorides is presented. The palladium catalyst is supported by Kwong’s indole‐based phosphine ligand and provides monoarylated amides in up to 95% yield. Excellent chemoselectivities (>10:1) in the mono‐ and diarylation with aryl bromides were achieved by careful selection of bases