Synthesis 2021; 53(18): 3333-3342
DOI: 10.1055/a-1506-3884
special topic
Bond Activation – in Honor of Prof. Shinji Murai

Iridium-Catalyzed Site-Selective Borylation of 8-Arylquinolines

Mirja Md Mahamudul Hassan
a   Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
,
Md Emdadul Hoque
a   Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
,
Sayan Dey
a   Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
,
Saikat Guria
a   Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
,
Brindaban Roy
b   University of Kalyani, Chemistry Department, Kalyani, Nadia, 741235, West Bengal, India
,
Buddhadeb Chattopadhyay
a   Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
› Author Affiliations
This work was supported by the Science and Engineering Research Board (SERB)-SUPRA (SPR/2019/000158), SERB-CRG (CRG/2018/000133), and SERB-STAR AWARD (STR/2019/000045). M.M.M.H. and M.E.H. thank University Grant Commission (UGC) for their Senior Research Fellowhips. S.D. and S.G. thank the Council of Scientific and Industrial Research (CSIR) for their Junior Research Fellowships. We also thank the Center of Bio-medical Research (CBMR) for research facilities.


Abstract

We report a convenient method for the highly site-selective borylation of 8-arylquinoline. The reaction proceeds smoothly in the presence of a catalytic amount of [Ir(OMe)(cod)]2 and 2-phenylpyridine derived ligand using bis(pinacolato)diborane as the borylating agent. The reactions occur with high selectivity with many functional groups, providing a series of borylated 8-aryl quinolines with good to excellent yield and excellent selectivity. The borylated compounds formed in this method can be transformed into various important synthons by using known transformations.

Supporting Information



Publication History

Received: 30 March 2021

Accepted after revision: 11 May 2021

Accepted Manuscript online:
11 May 2021

Article published online:
07 June 2021

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