@article {44644,
	title = {N-Heterocyclic carbene-catalyzed enantioselective synthesis of spiro-glutarimides via alpha,beta-unsaturated acylazoliums},
	journal = {Organic Letters},
	volume = {20},
	year = {2018},
	month = {AUG},
	pages = {4499-4503},
	abstract = {<p>NHC-catalyzed enantioselective [3 + 3] spiro-annulation of alpha,beta-unsaturated aldehydes with cyclic beta-ketoamides allowing the preparation of synthetically and biologically important spiro-glutarimide derivatives has been reported. The interception of the ketoamides with catalytically generated chiral alpha,beta-unsaturated acylazoliums proceeds in a Michael addition-intramolecular amidation pathway to deliver the spirocyclic products with good yield, diastereoselectivity, and enantioselectivity.</p>},
	issn = {1523-7060},
	doi = {10.1021/acs.orglett.8b01799},
	author = {Mondal, Santigopal and Ghosh, Arghya and Mukherjee, Subrata and Biju, Akkattu T.}
}
@article {44535,
	title = {N-Heterocyclic carbene-catalyzed michael-michael-lactonization cascade for the enantioselective synthesis of tricyclic delta-lactones},
	journal = {Organic Letters},
	volume = {20},
	year = {2018},
	month = {MAY},
	pages = {2952-2955},
	abstract = {<p>Enantioselective synthesis of tricyclic delta-lactones with three contiguous stereocenters has been demonstrated by the N-heterocyclic carbene (NHC)-catalyzed functionalization of benzylic C(sp(3))-H bonds. The NHC-catalyzed reaction of enals with dinitrotoluene derivatives under oxidative conditions proceeds via the chiral alpha,beta-unsaturated acylazoliums and produces the delta-lactones in good yields and excellent diastereoselectivity and enantioselectivity. This mild and atom-economic cascade reaction takes place in a Michael/Michael/lactonization sequence and tolerates a broad range of functional groups.</p>},
	issn = {1523-7060},
	doi = {10.1021/acs.orglett.8b00998},
	author = {Mukherjee, Subrata and Ghosh, Arghya and Marelli, Udaya Kiran and Biju, Akkattu T.}
}
