Palladium-catalyzed arylation of aryl sulfonamides with cyclohexanones
摘要:
Pd-catalyzed intermolecular aerobic dehydrogenative aromatizations have been developed for the arylation of aryl sulfonamides with cyclohexanones. Various N-aryl sulfonamides were selectively obtained in good yields using molecular oxygen as oxidant. The reaction tolerated a wide range of functionalities. (C) 2013 Elsevier B.V. All rights reserved.
This efficient reaction proceeds under very mild conditions with low cost nitration reagents and can be applied in gram-scale preparation.
这种高效反应在非常温和的条件下进行,使用成本低廉的硝化试剂,可用于克级制备。
Characteristic Hydrogen Bonding Observed in the Crystals of Aromatic Sulfonamides: 1D Chain Assembly of Molecules and Chiral Discrimination on Crystallization
achiral, except for kryptoracemates. In contrast, a high proportion of compounds with Helical or Straight patterns in the crystals showed chiral crystallization. Our classification is useful for discussion regarding the chirality of molecular assemblies, on the basis of the conformationalchirality of the molecules in the crystal.
Accessing bridged bicyclic compounds or meta carbon-functionalized anilines from the dearomatization of anilines
作者:Linfei Wang、Shuo-En Wang、Weibin Wang、Renhua Fan
DOI:10.1039/c3ra23224g
日期:——
The oxidative dearomatization of anilines was combined with a domino Michael addition, providing a series of nitrogen-containing bridged bicyclic compounds in moderate to excellent yields. The bridged bicyclic compound could be converted into the corresponding meta carbon-functionalized aniline derivative via a quinine-catalyzed tandem retro-oxa-Michael addition–aromatization reaction.
[3+2]-Annulation of platinum-bound azomethine ylides with distal CC bonds of N-allenamides
作者:Indradweep Chakrabarty、Suleman M. Inamdar、Manjur O. Akram、Amol B. Gade、Subhrashis Banerjee、Saibal Bera、Nitin T. Patil
DOI:10.1039/c6cc07874e
日期:——
A Pt-catalyzed, highly regioselective, reaction between N-allenamides and imino-alkynes leading to pyrrolo[1,2-a]indoles is described. This represents the firstexample of [3+2]-annulation of Pt-bound azomethine ylides with the distal C=C bond...
Stereoselective Synthesis of Acyclic Tetrasubstituted Alkenes from Anilines by Dearomatization and Trimethylenemethane Cycloaddition
作者:Lei Li、Qiuqin He、Renhua Fan
DOI:10.1021/acs.orglett.1c03974
日期:2022.1.14
A method for stereoselective construction of acyclic all-carbon tetrasubstituted alkenes through insertion of nitrile-substituted trimethylenemethane into the aryl C–N bond in anilines via an aromaticity destruction-reconstruction process is reported. The process involves dearomatization, azo-[3 + 2] TMM cycloaddition and aromatization-triggered rearrangement.