Synthesis of 1-benzyl-8,9-dihydroimidazo[4,5-c]pyrrolo[3,2-g]quinolin-4(5H)-one via palladium-catalyzed intramolecular arylation
摘要:
The synthesis of a novel tetracyclic structure, 8,9-dihydroimidazo[4,5-c]pyrrolo[3,2-g]quinolin-4(5H)-one, has been achieved by a convergent pathway. Coupling of the weakly nucleophilic hindered aromatic amine with 1-benzylimidazole-4-carboxylic acid, 7, afforded the corresponding amide 9 using a DCP/DMF complex; subsequent Heck-type arylation leading to desired tetracyclic molecule imidazo[4,5-c]-pyrrolo[3,2-g]quinolin-4(5H)-one. (C) 2004 Published by Elsevier Ltd.
Synthesis of 1-benzyl-8,9-dihydroimidazo[4,5-c]pyrrolo[3,2-g]quinolin-4(5H)-one via palladium-catalyzed intramolecular arylation
摘要:
The synthesis of a novel tetracyclic structure, 8,9-dihydroimidazo[4,5-c]pyrrolo[3,2-g]quinolin-4(5H)-one, has been achieved by a convergent pathway. Coupling of the weakly nucleophilic hindered aromatic amine with 1-benzylimidazole-4-carboxylic acid, 7, afforded the corresponding amide 9 using a DCP/DMF complex; subsequent Heck-type arylation leading to desired tetracyclic molecule imidazo[4,5-c]-pyrrolo[3,2-g]quinolin-4(5H)-one. (C) 2004 Published by Elsevier Ltd.
Cobalt Catalyzed Hydroarylation of Michael Acceptors with Indolines Directed by a Weakly Coordinating Functional Group
作者:Shyam Kumar Banjare、Rajesh Chebolu、P. C. Ravikumar
DOI:10.1021/acs.orglett.9b01228
日期:2019.6.7
A cobalt(III) catalyzed hydroarylation of Michael acceptors using indolines, selectively at the C-7 position, has been reported. For the selective C-7 functionalization of indoline, we have used a weakly coordinating amide carbonyl group. During the process of optimization, we have also discovered the unusual cocatalytic activity of zinc triflate in the C–H functionalization reaction. Hydroarylation