@article { ISI:000275756700018,
	title = {Bromine-induced facile synthesis of butenolides and spirobutenolides from sterically congested tetrasubstituted dialkyl alkylidene succinates},
	journal = {Synthesis-Stuttgart},
	number = {7},
	year = {2010},
	month = {APR},
	pages = {1188-1194},
	publisher = {GEORG THIEME VERLAG KG},
	address = {RUDIGERSTR 14, D-70469 STUTTGART, GERMANY},
	abstract = {<p>Starting from sterically congested tetrasubstituted dialkyl alkylidene succinates, facile general approach to several dialkyl substituted butenolides and spirobutenolides with the generation of quaternary carbon center has been demonstrated via bromine-induced dealkylative regioselective intramolecular cyclization and dehydrobromination pathway. The mechanistic aspects involved in the formation of butenolides have been also described in brief.</p>},
	keywords = {alkylidene succinates, bromine, butenolides, intramolecular cyclizations, spirobutenolides},
	issn = {0039-7881},
	doi = {10.1055/s-0029-1219233},
	author = {Patel, Ramesh M. and N. P. Argade}
}
@article {45473,
	title = {Organocatalytic asymmetric cascade reaction of gamma-substituted deconjugated butenolides with o-formyl-beta-nitrostyrene},
	journal = {ChemistrySelect},
	volume = {3},
	year = {2018},
	month = {JUL},
	pages = {8189-8192},
	type = {Article},
	abstract = {<p>An efficient chemo-, diastereo- and enantio-selective cascade synthesis of functionalized indanols bearing four contiguous stereogenic centres has been developed via the reaction of beta,gamma-butenolides with o-formyl-beta-nitrostyrenes in the presence of bi-functional hydrogen-bonding catalyst. Indanol derivatives containing gamma,gamma-disubstituted butenolides were obtained in good yields and with moderate to high enantioselectivities/diastereoselectivities.</p>},
	keywords = {butenolides, Cascade reaction, Enantioselectivity, Indanol, organocatalysis},
	issn = {2365-6549},
	doi = {10.1002/slct.201801467},
	author = {Deepake, Siddharth K. and Lanjewar, Atul B. and Thatikonda, Thanusha and Gonnade, Rajesh G. and Das, Utpal}
}
