@article {458,
	title = {Enhanced enantio- and diastereoselectivity via confinement and cation binding: Yang photocyclization of 2-benzoyladamantane derivatives within zeolites},
	journal = {Journal of Organic Chemistry},
	volume = {67},
	number = {24},
	year = {2002},
	note = {ISI Document Delivery No.: 620AATimes Cited: 5Cited Reference Count: 60},
	month = {Nov},
	pages = {8339-8350},
	type = {Article},
	abstract = {Irradiation of 2-benzoyladamantane derivatives in zeolites yields the endo-cyclobutanols as the only photoproduct via a gamma-hydrogen abstraction process. The cyclobutanols readily undergo retro-aldol reaction to give delta-ketoesters. The enantiomeric excess (ee) in the endo-cyclobutanols is measured by monitoring the ee in the ketoesters. Whereas in solution the ee in the product ketoester is zero, within achiral NaY zeolite, in the presence of a chiral inductor such as pseudoephedrine, ee{\textquoteright}s up to 28\% have been obtained. The influence of zeolite on several chiral esters of 2-benzoyladamantane-2-carboxylic acids has also been examined. Whereas in solution the diastereomeric excess is <15\%, in zeolite the delta-ketoesters are obtained in 79\% de (best examples). Ab initio computations suggest that enhancement of chiral induction within zeolites is likely to be due to cation complexation with the reactant ketone. Alkali ion-organic interaction, a powerful tool, is waiting to be fully exploited in photochemical and thermal reactions. In this context zeolites could be a useful medium as one could view them as a reservoir of "naked" alkali ions that are only partially coordinated to the zeolite walls.},
	keywords = {ABSOLUTE ASYMMETRIC-SYNTHESIS, ACID-DERIVATIVES, CATALYSTS, COMPLEXES, EPOXIDATION, INDUCTION, PHOTOREACTIONS, SOLID-STATE, STATE ORGANIC-PHOTOCHEMISTRY, TROPOLONE ETHER},
	isbn = {0022-3263},
	url = {<Go to ISI>://000179509400006},
	author = {Natarajan, A. and Joy, A. and Kaanumalle, L. S. and Scheffer, J. R. and Ramamurthy, V.}
}
@article {4554,
	title = {Computational prediction of the enantioselectivity of a solid-state photoreaction},
	journal = {Organic Letters},
	volume = {1},
	number = {8},
	year = {1999},
	note = {ISI Document Delivery No.: 281QKTimes Cited: 8Cited Reference Count: 26},
	month = {Oct},
	pages = {1279-1281},
	type = {Article},
	abstract = {[GRAPHICS] To better understand the forces controlling chemical reactions in crystals, the absolute asymmetric photorearrangement of 4-m-chlorobenzyloxy-2-pyridone leading to the corresponding enantiomerically enriched (78\% ee) beta-lactam was modeled computationally using a flexible minilattice consisting of a central reactant and 20 nearest and 72 next-nearest neighbors. The computational results predicted a preference for formation of the (R,R)-enantiomer, and this was verified experimentally by absolute configuration correlation studies.},
	keywords = {ABSOLUTE ASYMMETRIC-SYNTHESIS, CRYSTAL LATTICES, FORCE-FIELD, MEDIA, MODEL, MOLECULAR MECHANICS, NUCLEIC-ACIDS, PHOTOCHEMISTRY, PROTEINS},
	isbn = {1523-7060},
	url = {<Go to ISI>://000085172100037},
	author = {Garcia-Garibay, M. A. and Houk, K. N. and Keating, A. E. and Cheer, C. J. and Leibovitch, M. and Scheffer, J. R. and Wu, L. C.}
}
@article {4573,
	title = {The Norrish type II reaction in the crystalline state: Toward a better understanding of the geometric requirements for gamma-hydrogen atom abstraction},
	journal = {Tetrahedron},
	volume = {55},
	number = {4},
	year = {1999},
	note = {ISI Document Delivery No.: 159BRTimes Cited: 69Cited Reference Count: 58},
	month = {Jan},
	pages = {885-907},
	type = {Article},
	abstract = {By correlating the success or failure of the Norrish type II reaction for a series of compounds in the crystalline state with geometric data derived from X-ray crystallography (the so-called Crystal Structure-Solid State Reactivity Method), the distance and angular requirements for photochemical gamma-hydrogen atom abstraction have been established. These studies indicate that abstractions are preferred when the C=O ... H-gamma, distance is close to the sum of the van der Waals radii of hydrogen and oxygen (2.72 Angstrom), and that the gamma-hydrogen atom can deviate by as much as 50-60 degrees from the plane containing the oxygen n-orbital responsible for abstraction. Because molecular conformations and interatomic distances and angles can be calculated readily by using empirical force field methods, such data permit predictions to be made concerning the outcome of hypothetical Norrish type II processes. (C) 1999 Elsevier Science Ltd. All rights reserved.},
	keywords = {ABSOLUTE ASYMMETRIC-SYNTHESIS, CONFORMATIONAL CONTROL, ENVIRONMENT, KETONES, METHODOLOGY, MOLECULES, PHOTOCHEMISTRY, PHOTOCYCLIZATION, SOLID-STATE, SPECTRA},
	isbn = {0040-4020},
	url = {<Go to ISI>://000078152400001},
	author = {Ihmels, H. and Scheffer, J. R.}
}
@article {7194,
	title = {DIFFERENCES IN PHOTOCHEMICAL REACTIVITY OF 9,10-ETHENOANTHRACENE DERIVATIVES IN LIQUID AND CRYSTALLINE MEDIA},
	journal = {Tetrahedron},
	volume = {48},
	number = {16},
	year = {1992},
	note = {ISI Document Delivery No.: HP785Times Cited: 28Cited Reference Count: 66},
	month = {Apr},
	pages = {3251-3274},
	type = {Article},
	keywords = {ABSOLUTE ASYMMETRIC-SYNTHESIS, ACHIRAL REACTANTS, CHIRAL SINGLE-CRYSTALS, CONVERT, di-pi-methane, HIGH OPTICAL YIELD, II PHOTOREARRANGEMENTS, ORGANIC-CHEMISTRY, PHOTO-POLYMERIZATION, QUANTITATIVE ENANTIOMERIC YIELD, SOLID-STATE PHOTOCHEMISTRY},
	isbn = {0040-4020},
	url = {<Go to ISI>://A1992HP78500001},
	author = {Chen, J. X. and Scheffer, J. R. and Trotter, J.}
}
@article {7194,
	title = {DIFFERENCES IN PHOTOCHEMICAL REACTIVITY OF 9,10-ETHENOANTHRACENE DERIVATIVES IN LIQUID AND CRYSTALLINE MEDIA},
	journal = {Tetrahedron},
	volume = {48},
	number = {16},
	year = {1992},
	note = {ISI Document Delivery No.: HP785Times Cited: 28Cited Reference Count: 66},
	month = {Apr},
	pages = {3251-3274},
	type = {Article},
	keywords = {ABSOLUTE ASYMMETRIC-SYNTHESIS, ACHIRAL REACTANTS, CHIRAL SINGLE-CRYSTALS, CONVERT, di-pi-methane, HIGH OPTICAL YIELD, II PHOTOREARRANGEMENTS, ORGANIC-CHEMISTRY, PHOTO-POLYMERIZATION, QUANTITATIVE ENANTIOMERIC YIELD, SOLID-STATE PHOTOCHEMISTRY},
	isbn = {0040-4020},
	url = {<Go to ISI>://A1992HP78500001},
	author = {Chen, J. X. and Scheffer, J. R. and Trotter, J.}
}
