S<sub>8</sub>-Catalyzed triple cleavage of bromodifluoro compounds for the assembly of N-containing heterocycles
作者:Shuilin Deng、Haohua Chen、Xingxing Ma、Yao Zhou、Kai Yang、Yu Lan、Qiuling Song
DOI:10.1039/c9sc01333d
日期:——
cleavage of three C–X bonds, including two inert C(sp3)–F bonds on bromodifluoroacetamides, while leaving C–C bonds intact. This strategy will undoubtedly further consummate the role of halo difluoro compounds and enrich both fluorine chemistry and pharmaceutical sciences.
Palladium-catalyzed intermolecular carbonylative cross-coupling of heteroaryl C(sp<sup>2</sup>)–H bonds with amines: an efficient strategy for oxidative aminocarbonylation of azoles
作者:Qi Xing、Hui Lv、Chungu Xia、Fuwei Li
DOI:10.1039/c7cc03274a
日期:——
An efficient palladium-catalyzed oxidative aminocarbonylation of azoles has been developed. This system allows for intermolecular carbonylative cross-coupling of aromatic C(sp2)–H bonds with simple amines, which has often been asked for, but has not been realized so far. It provides a straightforward approach to a variety of azol-2-amides.
Dickore,K. et al., Justus Liebigs Annalen der Chemie, 1970, vol. 733, p. 70 - 87
作者:Dickore,K. et al.
DOI:——
日期:——
Dialkylaminoacetonitrile Derivatives as Amide Synthons. A One-Pot Preparation of Heteroaryl Amides via a Strategy of Sequential S<sub>N</sub>Ar Substitution and Oxidation
作者:Zhongxing Zhang、Zhiwei Yin、John F. Kadow、Nicholas A. Meanwell、Tao Wang
DOI:10.1021/jo030233j
日期:2004.2.1
Dialkylamino acetonitrile derivatives were utilized as alternative to cyanohydrin synthons for preparation of the corresponding heteroaryl dialkyl amides via a strategy of sequential base-mediated coupling and oxidation. The most advantageous oxidant, NiO2-H2O, can readily oxidize 2-substituted aminoacetonitriles to the corresponding amides under both basic and neutral conditions by forming cyanohydrins in situ.
Direct amidation of azoles with formamides via metal-free C–H activation in the presence of tert-butyl perbenzoate
作者:Tao He、Hongji Li、Pinhua Li、Lei Wang
DOI:10.1039/c1cc13086b
日期:——
A novel and simple method for the direct amidation of azoles with formamides has been developed. The reaction could occur smoothly in the presence of tert-butyl perbenzoate (TBPB) as an oxidant under metal- and base-free conditions. Direct dehydrogenativecross-coupling of formamides and azoles generated the corresponding products in good yields.