Title:Chemistry of 2-(Pipridin-1-yl) and/ or 2-(Morpholin-1-yl) Quinolines (Part
II): Synthesis, Reactivity and Biological Activities
Volume: 20
Issue: 1
Author(s): Moustafa A. Gouda*Ghada G. El-Bana
Affiliation:
- Department of Chemistry, Faculty of Science and Arts, Taibah University, AlUla, Madina, Saudi Arabia
- Department of Chemistry, Faculty of Science, Mansoura University, El-Gomhoria Street, Mansoura 35516, Egypt
Keywords:
2-chloroquinoline-3-carbaldehyde, 2-(piperidin-1-yl) quinoline, 2-(morpholin-1-yl) quinoline, benzoimidazole, Claisen-Schmidt condensation, Vilsmeier-Haack.
Abstract:
Background: Vilsmeier-Haack formylation of N-arylacetamides and used them as a key
intermediate for preparation of 2-(piperidin-1-yl) and/ or 2-(morpholin-1-yl) quinoline-3-
carbaldehydes. these used as precursors for the synthesis of 2-(piperidin-1-yl) and/ or 2-(morpholin-
1-yl) quinoline derivatives through the reaction with active methyl and/ or methylene component,
Claisen-Schmidt condensation, one-pot multicomponent reactions (MCRs), reductive amination,
Grignard reaction, etc.
Methods: This review demonstrates the synthesis of 2-chloroquinoline-3-carbaldehyde derivatives,
through Vilsmeier-Haack formylation of N-arylacetamides that used as a precursor for preparation of
2-(piperidin-1-yl) and/ or 2-(morpholin-1-yl) quinoline- 3-carbaldehydes and reacted them with various
reagents to form the 2-(piperidin-1-yl) and/ or 2-(morpholin-1-yl) quinolines derivatives.
Results: Many 2-(piperidin-1-yl) and/ or 2-(morpholin-1-yl) quinolines derivatives were achived
through the reaction with active methyl and/ or methylene component, Claisen-Schmidt condensation,
one-pot multicomponent reactions (MCRs), reductive amination, Grignard reaction, etc….
Conclusion: Many quinoline ring systems, specifically concerning medicinal chemistry, had been
published over the past decade. During this review, we have outlined the synthetic routes and reactions
of 2-(piperidin-1-yl) and/ or 2-(morpholin-1-yl) quinoline-3-carbaldehydes. This review implies
a section of the synthesis of 2-(piperidin-1-yl) and/ or 2-(morpholin-1-yl) quinoline-3-carbaldehydes
which can be prepared via Vilsmeier formylation of N-arylacetamides followed by heating of the
formed aldehydes with piperidine or morpholine and two sections on its reactions with different reagents
were presented. Eventually, this review focus upon 2-(piperidin-1-yl) and/ or 2-(morpholin-1-
yl) quinoline-3-carbaldehydes as an interesting heterocyclic compound that can be utilized as a precursor
and building block for the synthesis of an extended range of heterocyclic systems which have
a potent pharmacological interest.