Synthesis 2023; 55(05): 808-820
DOI: 10.1055/s-0041-1738429
paper

Microwave-Assisted Domino Povarov-Type [4+2] Cycloaddition: A Rapid Access to 7-Phenyl-6H-chromeno[4,3-b]quinolines

Dakoju Ravi Kishore
,
Kurella Mounika
,
Komal Goel
,
Jakkula Naveen
,
We greatly acknowledge financial support from the Department of Science and Technology, Science and Engineering Research Board (DST-SERB, Grant EMR/2017/005312), New Delhi. D.R.K. and K.G. gratefully acknowledge the University Grants Commission (UGC), while K.M. and J.N. acknowledge the Council of Scientific and Industrial Research, India (CSIR) for providing a fellowship.


Abstract

A convenient, facile, and eco-friendly approach to synthesizing 7-phenyl-6H-chromeno[4,3-b]quinolines under microwave irradiation is presented. The current strategy enabled the synthesis of chromenoquinoline frameworks at 80 °C under shorter reaction times via intermolecular Schiff base formation followed by an intramolecular inverse demand hetero-Diels–Alder [4+2]-cycloaddition reaction by using a catalytic amount of copper triflate as the sole catalyst. Consequently, one C–N and two C–C bonds are constructed in a single pot, and a wide spread of 7-phenyl-6H-chromeno[4,3-b]quinolines have been synthesized with good functional group tolerance.

Supporting Information



Publication History

Received: 05 August 2022

Accepted after revision: 10 November 2022

Article published online:
15 December 2022

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