A new and efficient method for the synthesis of amides via palladium-catalyzed C−C coupling of arylhalides with isocyanides is reported, by which a series of amides were formed from readily available starting materials under mild conditions. This transformation could extend its use to the synthesis of natural products and significant pharmaceuticals.
Carboxylate-Assisted Iridium-Catalyzed C−H Amination of Arenes with Biologically Relevant Alkyl Azides
作者:Tao Zhang、Xuejiao Hu、Zhen Wang、Tiantian Yang、Hao Sun、Guigen Li、Hongjian Lu
DOI:10.1002/chem.201504880
日期:2016.2.24
wide substrate scope is reported. Benzamides with electron‐donating and ‐withdrawing groups and linear, branched, and cyclic alkyl azides are all applicable. Cesium carboxylate is crucial for both reactivity and regioselectivity of the reactions. Many biologically relevant molecules, such as amino acid, peptide, steroid, sugar, and thymidine derivatives can be introduced to arenes with high yields and
An efficient and convenient iridium(III) catalyzed ortho-C–H bond amidation of weakly coordinating benzamides treated with readily available sulfonyl azides as the amino source has been described. In this transformation, ionic liquids represents an ideal reaction medium, giving rise to a broad range of amidation products under mild conditions in the open air. This protocol offers moderate to excellent
已经描述了用容易获得的磺酰叠氮化物作为氨基源处理的弱配位苯甲酰胺的有效且方便的铱( III )催化邻-C-H键酰胺化。在这种转变中,离子液体代表了一种理想的反应介质,在温和的露天条件下可产生多种酰胺化产物。该协议提供中等至优异的化学产量、独特的区域选择性和良好的官能团耐受性。
Cp*Co<sup>III</sup>–Catalyzed <i>syn</i>-Selective C–H Hydroarylation of Alkynes Using Benzamides: An Approach Toward Highly Conjugated Organic Frameworks
作者:Sourav Sekhar Bera、Suvankar Debbarma、Avick Kumar Ghosh、Santanu Chand、Modhu Sudan Maji
DOI:10.1021/acs.joc.6b02516
日期:2017.1.6
achieved to avail mono- or dihydroarylated amide products selectively in an atom and step economic way. Several important functional groups were tolerated under the reaction conditions, and syn-hydroarylation products were exclusively isolated. Notably, a 4-fold C–H hydroarylation provided a highly conjugated organic framework in one step. Kineticstudy with extensive deuterium labeling experiments were
An efficient and alternative oxidative cross-coupling strategy startingfromarylboronicacids and isocyanides for the selective synthesis of amides and diaryl ketones with palladium/copper catalysis is developed. Various substituted benzamides and benzophenones could be obtained in good yields. The reaction represents an efficient and alternative strategy for the synthesis of carbonyl compounds.