报道了一种由宝石-二溴乙烯基和磺酰胺合成吡咯并//吲哚并[1,2- a ]喹啉和萘并[2,1- b ]噻吩的高效简单途径。该报告的值得注意的特点是该方法涉及两步协议,即通过一锅法通过Cu(I)催化的乙酰胺的形成,然后由Ag(I)辅助的分子内合成三环和四环杂环。氢芳基化。还研究了在固态和溶液态的吡咯并-和吲哚并[1,2- a ]喹啉的代表性实例的光物理性质。
Organic Ligand-Free Alkylation of Amines, Carboxamides, Sulfonamides, and Ketones by Using Alcohols Catalyzed by Heterogeneous Ag/Mo Oxides
作者:Xinjiang Cui、Yan Zhang、Feng Shi、Youquan Deng
DOI:10.1002/chem.201001915
日期:2011.1.17
that is, amines, carboxamides, sulfonamides, and ketones, were successfully synthesized through a borrowing‐hydrogen mechanism. Up to 99 % isolated yields were obtained under relatively mild conditions without additive organic ligand. The catalytic process shows promise for the efficient and economic synthesis of amine, carboxamide, sulfonamide, and ketone derivatives because of the simplicity of the
复杂且昂贵的有机配体通常在制备或工业水平的精细化学合成中必不可少。通过使用不具有添加剂有机配体的非均相催化剂体系来合成精细化学品是非常合乎需要的,但由于它们的通用性差和严格的反应条件而受到严格限制。在这里,我们显示了具有特定Ag 6 Mo 10 O 33的Ag / Mo杂化材料催化形成碳-氮或碳-碳键的结果晶体结构。通过借氢机制成功合成了48种含氮或氧的化合物,即胺,羧酰胺,磺酰胺和酮。在没有添加剂有机配体的条件下,在相对温和的条件下可获得高达99%的分离产率。催化过程显示出胺,羧酰胺,磺酰胺和酮衍生物的高效经济合成的希望,因为该系统简单且易于操作。
Palladium-Catalyzed<i>N-</i>Alkylation of Amides and Amines with Alcohols Employing the Aerobic Relay Race Methodology
reactions of amines/amides with alcohols in the past. By employing the aerobicrelayracemethodology with Pd‐catalyzed aerobicalcohol oxidation being a more effective protocol for alcohol activation, ligand‐free homogeneous palladiums are successfully used as active catalysts in the dehydrative N‐alkylation reactions, giving high yields and selectivities of the alkylated amides and amines. Mechanistic
Boron-Catalyzed <i>N</i>-Alkylation of Arylamines and Arylamides with Benzylic Alcohols
作者:Murali Mohan Guru、Pradip Ramdas Thorve、Biplab Maji
DOI:10.1021/acs.joc.9b02816
日期:2020.1.17
A sustainable boron-based catalytic approach for chemoselective N-alkylation of primary and secondary aromatic amines and amides with primary, secondary, and tertiary benzylic alcohols has been presented. The metal-free protocol operates at low catalyst loading, tolerates several functional groups, and generates H2O as the sole byproduct. Preliminary mechanistic studies were performed to demonstrate
Sulfonyl Azides as Precursors in Ligand-Free Palladium-Catalyzed Synthesis of Sulfonyl Carbamates and Sulfonyl Ureas and Synthesis of Sulfonamides
作者:Shiao Y. Chow、Marc Y. Stevens、Luke R. Odell
DOI:10.1021/acs.joc.5b02755
日期:2016.4.1
An efficientsynthesis of sulfonyl carbamates and sulfonyl ureasfrom sulfonyl azides employing a palladium-catalyzed carbonylation protocol has been developed. Using a two-chamber system, sulfonyl azides, PdCl2, and CO gas, released ex situ from Mo(CO)6, were assembled to generate sulfonyl isocyanates in situ, and alcohols and aryl amines were exploited as nucleophiles to afford a broad range of sulfonyl
General Strategy for Stereoselective Synthesis of β-<i>N</i>-Glycosyl Sulfonamides via Palladium-Catalyzed Glycosylation
作者:Yuanwei Dai、Jianfeng Zheng、Qiang Zhang
DOI:10.1021/acs.orglett.8b01506
日期:2018.7.6
A highly efficient and mild glycosylation reaction between 3,4-O-carbonate glycal and N-tosyl functionalized aliphatic and aromatic amines via palladium-catalyzed decarboxylative allylation is disclosed. A wide range of highly functionalized 2,3-unsaturated β-N-glycosides are furnished in good to excellent yields and complete regioselectivity and stereoselectivity. In addition, applications of the