Synthesis 2017; 49(17): 3937-3944
DOI: 10.1055/s-0036-1589011
special topic
© Georg Thieme Verlag Stuttgart · New York

C–H and N–H Bond Annulation of Benzamides with Isonitriles Catalyzed by Cobalt(III)

Deepti Kalsi
Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Uttar Pradesh, India   Email: basker@iitk.ac.in
,
Nagaraju Barsu
Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Uttar Pradesh, India   Email: basker@iitk.ac.in
,
Pardeep Dahiya
Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Uttar Pradesh, India   Email: basker@iitk.ac.in
,
Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Uttar Pradesh, India   Email: basker@iitk.ac.in
› Author Affiliations
Financial support provided by SERB (EMR2016/000136) to support this research work is gratefully acknowledged. D.K. thanks IITK, N.B. and Pardeep express gratitude to CSIR for their fellowships.
Further Information

Publication History

Received: 03 March 2017

Accepted after revision: 04 April 2017

Publication Date:
11 May 2017 (online)


Published as part of the Special Topic Cobalt in Organic Synthesis

In memory of Prof. Shunsuke Murahashi for pioneering work in cobalt-catalyzed C–H bond functionalization

Abstract

A simple efficient, atom-economical procedure was developed for the cobalt-catalyzed C–H bond annulation of benzamides with isonitriles under mild conditions. The reaction tolerates a variety of functional group including heterocycles. Diverse 3-(alkylimino)-2-quinolin-8-yl-2,3-dihydro-1H-isoindol-1-ones were synthesized using isonitriles as the C1 source through C–H and N–H bond annulation via C–H bond activation in a ‘green’ solvent. Vinylamides were also used similarly with tert-butyl isonitrile to give 3-(tert-butylimino)-1-quinolin-8-yl-1H-pyrrol-2(5H)-ones.

Supporting Information