Co(III)-Catalyzed Synthesis of Quinazolines via C–H Activation of <i>N</i>-Sulfinylimines and Benzimidates
作者:Fen Wang、He Wang、Qiang Wang、Songjie Yu、Xingwei Li
DOI:10.1021/acs.orglett.6b00227
日期:2016.3.18
as a synthon of nitriles, and subsequent coupling with arenes such as N-sulfinylimines and benzimidates bearing a functionalizable directing group provided facile access to two classes of quinazolines under Co(III)-catalysis.
An iridium-catalyzed acylmethylation and a rhodium-catalyzed amidation of naphthalene derivatives are reported, adopting sulfoxonium ylides and dioxazolones as carbene and nitrene transfer agents, respectively. The use of SMe group as a directing group was key to ensure the peri-selective functionalization, and it can be easily removed or diversely transformed to other synthetically useful functionalities
Synthesis of 2,5-Disubstituted Oxazoles and Oxazolines Catalyzed by Ruthenium(II) Porphyrin and Simple Copper Salts
作者:Chuan Long Zhong、Bo Yang Tang、Ping Yin、Yue Chen、Ling He
DOI:10.1021/jo202663n
日期:2012.5.4
A novel and moderate synthesis of 2,5-disubstituted oxazoles and oxazolines involving ruthenium(II) porphyrin copper chloride catalyzed cyclization was developed. These reactions using readily available benzene carboxylic acids and phenylethenes or phenylacetylenes are performed under mild conditions. The reactions proceed in series, giving rise to the formation of an intermolecular C-N bond and an intramolecular C-O bond, which yield oxazole or oxazoline derivatives simultaneously.