@article {42442,
	title = {Synthesis of functionalized coumarins and quinolinones by NHC-catalyzed annulation of modified enals with heterocyclic C-H acids},
	journal = {Journal of Organic Chemistry},
	volume = {79},
	year = {2014},
	month = {APR},
	pages = {4245{\textendash}4251},
	abstract = {<p>N-Heterocyclic carbene (NHC) catalyzed lactonization and lactamization of 2-bromoenals with heterocyclic C{\textendash}H acids proceeding via the α,β-unsaturated acyl azolium intermediates is reported. The reaction furnished coumarin- or quinolinone-fused lactone/lactam derivatives. In addition, results of the enantioselective version of this reaction using chiral NHC are presented.</p>},
	doi = {10.1021/jo500693h},
	author = {Yetra, Santhivardhana Reddy and Roy, Tony and Bhunia, Anup and Porwal, Digvijay and Biju, Akkattu T.}
}
