Alkylation of Allyl/Alkenyl Sulfones by Deoxygenation of Alkoxyl Radicals
作者:Jia-Bin Han、Ao Guo、Xiang-Ying Tang
DOI:10.1002/chem.201806138
日期:2019.2.26
challenging deoxygenation of alkoxyl radicals from readily accessible alcohol derivatives was developed, affording facile synthesis of functionalized alkenes with good functional group tolerance under mild reaction conditions. Because alkoxyl radicals can easily undergo β‐fragmentations or hydrogen abstractions, this new strategy for deoxygenation of alkoxyl radicals is highly valuable. Moreover, mechanistic
Cu-Facilitated C−O Bond Formation Using <i>N</i>-Hydroxyphthalimide: Efficient and Selective Functionalization of Benzyl and Allylic C−H Bonds
作者:Ji Min Lee、Eun Ju Park、Seung Hwan Cho、Sukbok Chang
DOI:10.1021/ja8031218
日期:2008.6.1
A highly efficient protocol for the benzyl or allylic C-H functionalization of simple hydrocarbons has been developed using stoichiometric amounts of N-hydroxyphthalimide and Phl(OAc)(2) in the presence of CuCl catalyst. The reaction was revealed to proceed via a radical pathway, in which phthalimide N-oxyl (PINO) radical plays a dual role, serving as a catalytic hydrogen abstractor from hydrocarbons as well as a stoichiometric reagent to couple with the resultant alkyl radicals.