@article {1411,
	title = {Pyrrole synthesis catalyzed by AgOTf or cationic Au(I) complexes},
	journal = {Journal of Organic Chemistry},
	volume = {71},
	number = {12},
	year = {2006},
	note = {ISI Document Delivery No.: 049PTTimes Cited: 65Cited Reference Count: 71Harrison, Tyler J. Kozak, Jennifer A. Corbella-Pane, Montserrat Dake, Gregory R.},
	month = {Jun},
	pages = {4525-4529},
	type = {Article},
	abstract = {Either silver trifluoromethanesulfonate or a mixture of gold( I) chloride, silver trifluoromethanesulfonate, and triphenylphosphine catalyze the formation of pyrroles from substituted beta-alkynyl ketones and amines. The reactions proceed by using 5 mol \% of catalyst with yields of isolated pyrroles ranging from 13\% to 92\%. Sixteen examples are used to compare the effectiveness of each catalyst.},
	keywords = {2-PROPYNYL-1, 3-DICARBONYL COMPOUNDS, AMINATION/ANNULATION REACTIONS, C-H BONDS, CARBOXYLIC-ACIDS, DERIVATIVES, EFFICIENT SYNTHESIS, FURANS, ONE-POT, PYRROLES, REGIOSELECTIVE SYNTHESIS, SUBSTITUTED},
	isbn = {0022-3263},
	url = {<Go to ISI>://000238029300023},
	author = {Harrison, T. J. and Kozak, J. A. and Corbella-Pane, M. and Dake, G. R.}
}
@article {1304,
	title = {Asymmetric synthesis of dihydrofurans via a formal retro-Claisen photorearrangement},
	journal = {Journal of the American Chemical Society},
	volume = {127},
	number = {8},
	year = {2005},
	note = {ISI Document Delivery No.: 901URTimes Cited: 13Cited Reference Count: 36},
	month = {Mar},
	pages = {2725-2730},
	type = {Article},
	abstract = {Solution-phase irradiation of a series of syn-7-benzoylnorbornene derivatives is shown to lead to cis-fused dihydrofuran derivatives in low quantum but excellent chemical yields in what is formally a retro-Claisen rearrangement. In analogy to the well-known Paterno-Buchi reaction, the first step of the rearrangement is suggested to involve (n,pi*)(3)-mediated addition of the carbonyl oxygen to the norbornene double bond, producing a triplet 1,4-biradical. This intermediate, rather than closing to the oxetane, undergoes cleavage accompanied by intersystem crossing to form the dihydrofuran. To determine whether the retro-Claisen photorearrangement could be carried out enantioselectively, the 7-benzoylnorbornene reactant was equipped with a para-carboxylic acid substituent to which a series of optically pure amines was attached ionically via salt bridges. Irradiation of these salts in the crystalline state followed by diazomethane workup (the solid-state ionic chiral auxiliary method) was shown to afford the corresponding dihydrofuran in optical yields as high as 93\% at 95\% conversion. X-ray crystallography revealed that the enantioselectivity arises from crystallization of the reactant in a conformation in which the carbonyl oxygen is more favorably oriented for bond formation to one end of the norbornene double bond than the other, thus leading to a predominance of a single enantiomer.},
	keywords = {FURANS, GENERAL-APPROACH, INDUCTION, PHENYL KETONES, PHOTOCHEMISTRY, PHOTOCYCLIZATION, REARRANGEMENT, SOLID-STATE},
	isbn = {0002-7863},
	url = {<Go to ISI>://000227308100059},
	author = {Xia, W. J. and Yang, C. and Patrick, B. O. and Scheffer, J. R. and Scott, C.}
}
