Directing Group in Decarboxylative Cross-Coupling: Copper-Catalyzed Site-Selective C–N Bond Formation from Nonactivated Aliphatic Carboxylic Acids
作者:Zhao-Jing Liu、Xi Lu、Guan Wang、Lei Li、Wei-Tao Jiang、Yu-Dong Wang、Bin Xiao、Yao Fu
DOI:10.1021/jacs.6b05788
日期:2016.8.3
Copper-catalyzed directed decarboxylative amination of nonactivated aliphatic carboxylic acids is described. This intramolecular C-N bond formation reaction provides efficient access to the synthesis of pyrrolidine and piperidine derivatives as well as the modification of complex natural products. Moreover, this reaction presents excellent site-selectivity in the C-N bond formation step through the
Improved Protocol for Indoline Synthesis via Palladium-Catalyzed Intramolecular C(sp<sup>2</sup>)–H Amination
作者:Gang He、Chengxi Lu、Yingsheng Zhao、William A. Nack、Gong Chen
DOI:10.1021/ol301352v
日期:2012.6.15
An efficient method has been developed for the synthesis of indoline compounds from picolinamide (PA)-protected β-arylethylamine substrates viapalladium-catalyzed intramolecular amination of ortho-C(sp2)–H bonds. These reactions feature high efficiency, low catalyst loadings, mild operating conditions, and the use of inexpensive reagents.
Pd-Catalyzed Remote δ-C(sp2)–H Functionalization in Phenylalaninol: Expanding the Library of Phenylalaninols
作者:Srinivasarao Arulananda Babu、Prabhakar Singh
DOI:10.1055/a-2147-3518
日期:2023.12
We report the Pd(II)-catalyzed, picolinamide-directed δ-C(sp2)–H (ortho) functionalization of phenylalaninol scaffolds. Assembling of (ortho) δ-C–H arylated, alkylated, benzylated, alkenylated, brominated, and iodinated phenylalaninol scaffolds was accomplished. The δ-C(sp2)–H arylation reaction of phenylalaninol occurred under neat conditions. Hydrolysis of the picolinamide moiety and synthetic utility
作者:Daniel H. O’ Donovan、Claudia De Fusco、David R. Spring
DOI:10.1016/j.tetlet.2016.05.068
日期:2016.7
Treatment of picolinic amides with excess zinc in aqueous hydrochloric acid at room temperature affords the corresponding amines in good to excellent yields. The mild reaction conditions exhibit useful functional group tolerance and facilitate the application of the picolinic amide moiety as a protecting group which can be easily introduced and selectively removed.