Pd(<scp>ii</scp>)-Catalyzed gamma-C(sp<sup>3</sup>)–H alkynylation of amides: selective functionalization of R chains of amides R<sup>1</sup>C(O)NHR
作者:Vinod G. Landge、Ayisha Parveen、Avanashiappan Nandakumar、Ekambaram Balaraman
DOI:10.1039/c8cc03445a
日期:——
of R chains of amides R1C(O)NHR, a fundamental class of synthetic substrates, has not been accomplished to date. Here, the first example of palladium(II)-catalyzed alkynylation of an unactivated gamma C(sp3)–H bond of alkyl amides (cyclic, linear, and amino acids) is reported. The kinetic experiment shows that the rate of the reaction depends on the coupling partners and the amides. Late-stage diversification
Palladium-Catalyzed Picolinamide-Directed Alkylation of Unactivated C(sp<sup>3</sup>)–H Bonds with Alkyl Iodides
作者:Shu-Yu Zhang、Gang He、William A. Nack、Yingsheng Zhao、Qiong Li、Gong Chen
DOI:10.1021/ja312277g
日期:2013.2.13
alkylation of γ-C(sp(3))-H bonds of picolinamide-protected aliphatic amine substrates with primary alkyl iodides via palladium catalysis. Ag(2)CO(3) and dibenzyl phosphate, (BnO)(2)PO(2)H, are critical promoters of this reaction. These reactions provide a convenient and straightforward method for the preparation of high-value N-containing products from readily available amine and alkyl iodide precursors