An efficient synthesis of benzothiazole using tetrabromomethane as a halogen bond donor catalyst
作者:Imran Kazi、Govindasamy Sekar
DOI:10.1039/c9ob02125f
日期:——
developed for the synthesis of 2-substituted benzothiazole under solvent- and metal-free conditions using CBr4 as the catalyst. This process involves the activation of a thioamidethroughhalogenbond formation between the sulphur atom of the thioamide and bromine atom of the CBr4 molecule. The presence of halogen-bonding interaction between N-methylthioamides and tetrabromomethane has been demonstrated
α-Arylation of Saturated Azacycles and <i>N</i>-Methylamines via Palladium(II)-Catalyzed C(sp<sup>3</sup>)–H Coupling
作者:Jillian E. Spangler、Yoshihisa Kobayashi、Pritha Verma、Dong-Hui Wang、Jin-Quan Yu
DOI:10.1021/jacs.5b06740
日期:2015.9.23
Pd(II)-catalyzed α-C(sp(3))-Harylation of pyrrolidines, piperidines, azepanes, and N-methylamines with arylboronic acids has been developed for the first time. This transformation is applicable to wide arrays of pyrrolidines and boronic acids, including heteroaromatic boronic acids. A diastereoselective one-pot heterodiarylation of pyrrolidines has also been achieved.
The thioamide group represents a highly attractive isostere of the amide bond. We report a combined structural and computational study on cis-thioamide conformation of N-thioacyl-N-methylanilines. Amide to thioamide replacement in a class of anilides that are highly valuable as conformational locks results in a higher preference for cis conformation in a unique compacted template intrinsic to the thioamide