Synthesis 2023; 55(21): 3454-3469
DOI: 10.1055/a-2058-0695
special topic
C–H Bond Functionalization of Heterocycles

Transition-Metal-Catalyzed Directed C8–H Carbon–Carbon Bond Formation in Quinolines and 1,2,3,4-Tetrahydroquinolines

Shubhajit Basak
,
Tripti Paul
,
Santu Mandal
,
Pallab Karjee
,
Maniya Vadakanamala Nanjegowda
,
Tharmalingam Punniyamurthy
S.B. and S.M. thank Department of Science and Technology, Ministry of Science and Technology, India, for INSPIRE Senior Research Fellowship. T. Paul and M.V.N. are thankful to the Ministry of Education, India, for a Prime Minister’s Research Fellowship (PMRF). P.K. acknowledges the Ministry of Education, India, for a Senior Research Fellowship.


Abstract

C8-Substituted quinoline (QN) and 1,2,3,4-tetrahydroquinoline (THQ) scaffolds are featured in numerous bioactive compounds and natural products. Appreciable efforts have been made towards the development of elegant techniques to functionalize the C8–H bond of QNs and THQs. The transition-metal-catalyzed chelation-assisted C–H activation strategy has emerged as an effective synthetic tool among existing methods. This review focuses on recent advances in transition-metal-catalyzed directed carbon–carbon bond forming reactions for the C8–H functionalization of QNs and THQs (till February 2023). The discussion has been categorized based on the type of reaction.

1 Introduction

2 Acylation

3 Alkylation

4 Alkenylation

5 Alkynylation

6 Allylation

7 Annulation

8 Arylation

9 Conclusion and Outlook



Publication History

Received: 28 February 2023

Accepted after revision: 20 March 2023

Accepted Manuscript online:
20 March 2023

Article published online:
25 April 2023

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