Pd(OAc)2 catalyzed C–H activation of 1,3,4-oxadiazoles and their direct oxidative coupling with benzothiazoles and aryl boronic acids using Cu(OAc)2 as an oxidant
作者:N. Salvanna、Gandolla Chinna Reddy、Biswanath Das
DOI:10.1016/j.tet.2012.12.080
日期:2013.3
The first direct oxidative coupling of 1,3,4-oxadiazoles with benzothiazoles has been accomplished usingPd(OAc)2 as a catalyst and Cu(OAc)2 as an oxidant. The similar combination of the catalyst and the oxidant has also been applied for direct arylation of 1,3,4-oxadiazoles with aryl boronic acids. Several novel oxadiazole derivatives have been prepared in high yields following both the methods.
Copper(II)-Catalyzed Dehydrogenative Cross-Coupling between Two Azoles
作者:Xurong Qin、Boya Feng、Jiaxing Dong、Xiaoyu Li、Ying Xue、Jingbo Lan、Jingsong You
DOI:10.1021/jo301128y
日期:2012.9.7
The copper(II)-catalyzed dehydrogenative coupling between two different azoles for the preparation of unsymmetrical biazoles has been developed. The current catalytic system can effectively control the chemoselectivity for heterocoupling over homocoupling.
Palladium catalyzed direct C–H arylation of 1,3,4-oxadiazole using ligand combination approach
作者:Sneha Prasad Bakare、Mahendra Patil
DOI:10.1016/j.tet.2024.133885
日期:2024.4
The use of combination of readily available ligands in palladiumcatalyzedC–Harylation of 1,3,4-oxadiazole with iodoarenes as well as bromoarenes is reported. The combination of phenanthroline monohydrate (Phen.HO) and triphenyl phosphine (PPh) with Pd catalyst exhibited improved catalytical activity compared to a single ligandused separately in the reaction. A wide range of 2,5-diarylated-1,3,4-oxadiazoles
Copper(II)-Mediated Dehydrogenative Cross-Coupling of Heteroarenes
作者:Zhifeng Mao、Zhe Wang、Zhaoqing Xu、Fei Huang、Zhengkun Yu、Rui Wang
DOI:10.1021/ol301517y
日期:2012.8.3
Cu(OAc)(2)-mediated dehydrogenative cross-coupling between two heteroarenes has been realized in the absence of any other additive. A mechanism involving a formal Cu(II) to Cu(0) route by convergent disproportionation of the copper mediator is proposed and has been evidenced by copper mirror formation during the reaction. This synthetic protocol provides a concise and "green" access to unsymmetrical biheteroarenes bearing structural motifs of substantial utility in organic synthesis.
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