Au(iii)-catalyzed intermolecular amidation of benzylic C–H bonds
作者:Yan Zhang、Bainian Feng、Chengjian Zhu
DOI:10.1039/c2ob26857d
日期:——
Au(III)-catalyzed intermolecular amidations of benzylic C–H bonds with sulfonamides and carboxamides are described. The protocol with the Au–bipy complex/N-bromosuccinimide system provides practical applications for synthesis of various amides via C–H activations. The reaction proceeds with high efficiency to give the corresponding amines, which are extremely useful synthetic intermediates.
Dehydrative Amination of Alcohols in Water Using a Water-Soluble Calix[4]resorcinarene Sulfonic Acid
作者:Shoichi Shimizu、Seiji Shirakawa
DOI:10.1055/s-2008-1078416
日期:2008.6
A protocol for the dehydrative amination of alcohols in water using a water-soluble calix[4]resorcinarene sulfonic acid as a reusable multifunctional catalyst was developed.
Halogen-Bond-Induced Consecutive C<sub>sp</sub><sup>3</sup>–H Aminations via Hydrogen Atom Transfer Relay Strategy
作者:Fan Wu、Jeewani P. Ariyarathna、Navdeep Kaur、Nur-E Alom、Maureen L. Kennell、Omar H. Bassiouni、Wei Li
DOI:10.1021/acs.orglett.0c00081
日期:2020.3.20
The utilization of a halogen bond in a number of chemical fields is well-known. Surprisingly, the incorporation of this useful noncovalent interaction in chemical reaction engineering is rare. We disclose here an uncommon use of halogen bonding to induce intermolecular C-sp(3)-H amination while enabling a hydrogen atom transfer relay strategy to access privileged pyrrolidine structures directly from alkanes. Mechanistic studies support the presence of multiple halogen bond interactions at distinct reaction stages.
AlCl<sub>3</sub>-Promoted Formal [2 + 3]-Cycloaddition of 1,1-Cyclopropane Diesters with <i>N</i>-Benzylic Sulfonamides To Construct Highly Stereoselective Indane Derivatives
作者:Mengyun Zhu、Jinqian Liu、Jianjun Yu、Liangshun Chen、Chunmei Zhang、Limin Wang
DOI:10.1021/ol500136x
日期:2014.4.4
An unprecedented AlCl3-promoted formal [2 + 3]-cycloaddition of 1,1-cyclopropanes with readily available N-benzylic sulfonamides has been developed. Experimental evidence supports an unusual mechanism wherein the donor acceptor cyclopropane serves as a source of 2-styrylmalonate rather than the "classical" 1,3-dipole. A broad range of 1,1-cyclopropanediesters undergo a carbocation-initiated cyclization reaction with N-benzylic sulfonamides to afford highly functionalized Indane derivatives in a fast and high-yielding procedure.