DBU-promoted cyclization of vinyl isocyanides with ethers via the functionalization of a C(sp<sup>3</sup>)–H bond for the synthesis of isoquinolines
作者:Ping Qian、Bingnan Du、Jie Zhou、Haibo Mei、Jianlin Han、Yi Pan
DOI:10.1039/c5ra11530b
日期:——
A DBU-promoted cascade functionalization of a C(sp3)–H bond adjacent to oxygen and a radical cyclization reaction of vinyl isocyanides was developed to easily access multi-functionalized isoquinolines.
hydroxyl-containing isoquinolines from a metal-free radical cyclization reaction of vinyl isonitriles with alcohols was developed with moderate-to-excellent yields. Vinyl isonitriles are coupled with alkyl radicals through direct catalytic functionalization of the α sp3 C–H bond of alcohols. The methodology demonstrates a broad substrate scope, shows excellent functional group tolerance, is highly atom-economical
Activation of perfluoroalkyl iodides by anions: extending the scope of halogen bond activation to C(sp<sup>3</sup>)–H amidation, C(sp<sup>2</sup>)–H iodination, and perfluoroalkylation reactions
A simple, efficient, and convenient activation of perfluoroalkyl iodides by tBuONa or KOH, without expensive photo- or transition metal catalysts, allows the promotion of versatile α-sp3 C–H amidation reactions of alkyl ethers and benzylic hydrocarbons, C–H iodination of heteroaryl compounds, and perfluoroalkylations of electron-rich π bonds. Mechanistic studies show that these novel protocols are