One Pot Sequential Aldol condensation-Michael Addition–Sonogashira, and Heck Arylation toward Highly Functionalized Quinolines

E Ubba, FR Nawaz Khan, C Teja… - Polycyclic Aromatic …, 2023 - Taylor & Francis
Polycyclic Aromatic Compounds, 2023Taylor & Francis
A facile Pd/Cu-cocatalyzed one-pot domino aldol condensation/Michael
addition/Sonogashira coupling has been developed. The reaction of 2-chloro-3-
formylquinolines (CFQs), 1 acetophenones (APs), 2 and terminal acetylenes, 3 by
employing triethylamine as a base, solvent as well as a ligand under mild conditions gave
highly functionalized 1, 5-diphenyl-3-(2-(2-phenylethynyl) quinolin-3-yl) pentane-1, 5-
diones, 4a-j, Additionally accomplished Heck arylation using CFQs in the presence of Pd …
Abstract
A facile Pd/Cu-cocatalyzed one-pot domino aldol condensation/Michael addition/Sonogashira coupling has been developed. The reaction of 2-chloro-3-formylquinolines (CFQs), 1 acetophenones (APs), 2 and terminal acetylenes, 3 by employing triethylamine as a base, solvent as well as a ligand under mild conditions gave highly functionalized 1,5-diphenyl-3-(2-(2-phenylethynyl)quinolin-3-yl)pentane-1,5-diones, 4a-j, Additionally accomplished Heck arylation using CFQs in the presence of Pd catalyst. The present methodology gave the desired synthetic building blocks in acceptable yields.
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