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
Copper-Catalyzed Chemodivergent Synthesis of Oxazoles and Imidazolidones by Selective C–O/C–N Cyclization
作者:Jian Tang、Fengjie Lu、Xinyi Zhang、Yiming Su、Ensheng Zhang、Zhiyu Yang
DOI:10.1021/acs.joc.3c00505
日期:2023.7.21
Efficient synthesis of phenylalanine-derived oxazoles and imidazolidones can be achieved by copper-catalyzed reactions that are controlled by directing groups and proceed by selective C–O or C–Ncoupling. This strategy employs inexpensive commercial copper catalysts and readily available starting materials. It uses a convenient reaction procedure and provides a reliable approach to the versatile and