1453491-64-9Relevant academic research and scientific papers
Multicomponent reaction comprising one-pot installation of bidentate directing group and Pd(II)-catalyzed direct β-arylation of C(sp3)[sbnd]H bond of aliphatic and alicyclic carboxamides
Mohan, Sruthi,Gopalakrishnan, Bojan,Babu, Srinivasarao Arulananda
, p. 5853 - 5863 (2016/09/07)
In this paper, we report a step-economical one-pot multicomponent reaction protocol comprising the installation of the bidentate directing group (auxiliary) followed by Pd(II)-catalyzed sp3C[sbnd]H activation and β-arylation of various aliphatic/alicyclic carboxamides. Accordingly, the reaction of a mixture of an aliphatic/alicyclic acid chloride, bidentate directing auxiliary (e.g., 8-aminoquinoline) and an aryl iodide in the presence of the Pd(OAc)2catalyst and Ag2CO3additive directly afforded the corresponding β-C[sbnd]H-arylated N-(quinolin-8-yl)carboxamide derivative. To demonstrate the efficiency of the process, various bidentate directing auxiliaries were used and 8-Aminoquinoline was found to be the best directing group for accomplishing the one-pot Pd(II)-catalyzed, sp3C[sbnd]H activation and β-arylation of aliphatic/alicyclic carboxamides. A variety of aliphatic/alicyclic acid chlorides and aryl iodides were used as the substrates and several β-C[sbnd]H arylated carboxamide derivatives were synthesized in moderate to high yields via the multicomponent reaction strategy.
Palladium-Catalyzed Asymmetric Arylation of C(sp3)-H Bonds of Aliphatic Amides: Controlling Enantioselectivity Using Chiral Phosphoric Amides/Acids
Yan, Shao-Bai,Zhang, Song,Duan, Wei-Liang
supporting information, p. 2458 - 2461 (2015/06/02)
Enantioselective arylation of secondary β-C(sp3)-H bonds of 8-aminoquinoline amides was realized with a palladium catalyst. Chiral phosphoric amides and acids were used for the first time to control the stereoselectivity at the C-H bond cleavag
Pd(II)-catalyzed intermolecular arylation of unactivated C(sp 3)-H bonds with aryl bromides enabled by 8-aminoquinoline auxiliary
Wei, Yu,Tang, Huarong,Cong, Xuefeng,Rao, Bin,Wu, Chao,Zeng, Xiaoming
supporting information, p. 2248 - 2251 (2014/05/06)
An example of using readily available, less reactive aryl bromides as arylating reagents in the Pd(II)-catalyzed intermolecular arylation of unactivated C(sp3)-H bonds is described. This reaction was promoted by a crucial 8-aminoquinolinyl directing group and a K2CO3 base, enabling regiospecific installation of an aryl scaffold at the β-position of carboxamides. A mechanistic study by DFT calculations reveals a C(sp3)-H activation-led pathway featuring the oxidative addition as the highest energy transition state.
Direct arylation of primary and secondary sp3 C-H bonds with diarylhyperiodonium salts via Pd catalysis
Pan, Fei,Shen, Peng-Xiang,Zhang, Li-Sheng,Wang, Xin,Shi, Zhang-Jie
supporting information, p. 4758 - 4761 (2013/10/08)
Palladium-catalyzed primary and secondary sp3 C-H bond arylation is reported. The method using diarylhyperiodonium salts as arylation reagents shows good functional group tolerance and proceeds under mild reaction conditions. The KIE experiment
