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Start Over Author "Sancho U" Journal organic letters
3 results on '"Sancho U"'

1. Triplet versus Singlet Photoreaction Mechanism in the Barrelene Di-π-methane Rearrangement

Author

Frutos, L. M., Sancho, U., and Castano, O.

Abstract

A detailed study of the potential energy surfaces involved in the di-π-methane rearrangement (singlet and triplet states) reveals the factors that modulate the mechanisms (pathways) and reactivity in strained di-π-methane systems such as bicyclo[2.2.2]octa-2,5,7-triene (barrelene).

Published
2004

2. First synthesis of biquinoliziniun salts: novel example of a chiral azonia dication.

Author

García-Cuadrado D, Cuadro AM, Alvarez-Builla J, Sancho U, Castaño O, and Vaquero JJ

Subjects
Models, Molecular, Palladium chemistry, Salts, Stereoisomerism, Quinazolines chemical synthesis
Abstract

[Structure: see text] The 1,1'-, 2,2'-, and 3,3'-biquinolizinium dications are described for the first time and were prepared using palladium-catalyzed homocoupling reactions of the corresponding isomeric bromoquinolizinium bromides. Theoretical calculations show 1,1'- and 4,4'-biquinolizinium dications to be chiral molecules, the latter of which has a high energy of formation, a factor that probably precludes its formation.

Published
2006
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3. Triplet versus singlet photoreaction mechanism in the barrelene di-pi-methane rearrangement.

Author

Frutos LM, Sancho U, and Castaño O

Subjects
Biophysical Phenomena, Biophysics, Molecular Structure, Photochemistry, Thermodynamics, Bridged Bicyclo Compounds chemistry, Methane chemistry
Abstract

A detailed study of the potential energy surfaces involved in the di-pi-methane rearrangement (singlet and triplet states) reveals the factors that modulate the mechanisms (pathways) and reactivity in strained di-pi-methane systems such as bicyclo[2.2.2]octa-2,5,7-triene (barrelene). [structure: see text]

Published
2004
Full Text
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