Buscar
Mostrando ítems 1-10 de 105
An analytic ring closure condition for geometrical algorithm to search the conformational space
(Elsevier Science, 2000-07-24)
The recently reported geometrical algorithm to search the conformational space (GASCOS) scans conformational space exhaustively using an internal coordinate tree search. Using only geometrical operations and a set of ...
Normalization of Rings
(Elsevier, 2010-08)
We present a new algorithm to compute the integral closure of a reduced Noetherian ring in its total ring of fractions. A modification, applicable in positive characteristic, where actually all computations are over the ...
Partially relaxed ring closure conditions for geometrical algorithm to search the conformational space for minimum energy conformations
(Elsevier Science, 2001-02-28)
We have reported a systematic search method, GASCOS, for open chain compounds. An extension to cyclic structures was recently reported. In this paper, we propose a more complete range of tolerance for some of the bond ...
Synthesis of carbazoles by intramolecular arylation of diarylamide anions
(American Chemical Society, 2009-12)
The synthesis of a series of substituted 9H-carbazoles by the photostimulated SRN1 substitution reactionwith diarylamines as starting substrate was performed. The diarylamines were obtained by two approaches,the Pd-catalyzed ...
Novel kinetic model in amorphous polymers. Spiropyran-merocyanine system revisited
(Amer Chemical SocWashington, 1997)
The Baylis-Hillman reaction with chiral alpha-amino aldehydes under racemization-free conditions
(Georg Thieme Verlag KgStuttgartAlemanha, 2006)
Synthesis of Carbolines by Photostimulated Cyclization of Anilinohalopyridines
(American Chemical Society, 2011-08)
A general synthetic route to prepare all four carboline regioisomers by photostimulated cyclization of anilinohalopyridines is described. The methodology affords various substituted carbolines in good to excellent yields. ...