Buscar
Mostrando ítems 1-10 de 39
Intramolecular azide-alkene cycloaddition-elimination reaction in an aldohex-2-enonic acid derivative
(Elsevier, 2019-09)
A 6-azido-2-tosylenolate, obtained from D-glucono-1,5-lactone in six steps, underwent an intramolecular cycloaddition–elimination pathway under mild conditions, yielding a chiral, substituted 5,6-dihydro-4H-pyrrolo ...
A DFT Study of the Regioselectivity in Intramolecular Diels-Alder Reactions with Formation of a Tricyclodecane Skeleton
(Bentham Science Publishers, 2010-11-02)
Three different intramolecular Diels-Alder (IMDA) reactions associated with the formation of fused and
bridged tricyclodecane skeletons have been studied at the B3LYP/6-31G(d) computational level. While substitution on ...
Síntesis de triazoles tricíclicos fusionados vía cicloadición intramolecular [3+2]
(Universidad Autónoma Metropolitana (México). Unidad Azcapotzalco. División de Ciencias Básicas e Ingeniería., 2017)
En el presente trabajo reportamos una síntesis asequible, eficiente y atractiva para la formación de triazoles tricíclicos fusionados con dos centros quirales definidos. A partir de una reacción de multicomponentes, que ...
Novel Cyclic Enaminone Esters and N-Heterocycles by Divergent Chemical Behavior through Amine-Mediated Reactions
(Wiley VCH Verlag, 2015-07)
New acridinones and enaminone esters were synthesized by microwave-assisted tandem-Michael-Michael addition and cyclization from cyclohexane-1,3-diones. The reaction mechanism for both open and closed structures, and the ...
INTRAMOLECULAR [4+2] DIELS-ALDER CYCLOADDITIONS OF 2-SUBSTITUTED PHOSPHABENZENE AND ARSABENZENE IN TRIOSMIUM CLUSTERS
(Amer. Chem. Soc., 1994-09)
2-(Trimethylsilyl)-1-phosphabenzene and -1-arsabenzene, Me(3)SiC(5)H(4)E (E = P, AS), react with [Os3H2(CO)(10)] to give the clusters [Os3H2(Me(3)SiC(5)H(4)E)(CO)(9)], which contain sigma-bonded, four-electron-donating mu ...
Unraveling the selectivity patterns in phosphine-catalyzed annulations of azomethine imines and allenoates
(American Chemical Society, 2020)
The mechanism and selectivity of phosphine-catalyzed [3 + 2] and [3 + 3] annulations of azomethine imines and allenoates have been computationally studied. Exploration of the potential energy surface reveals that the ...
Correlating experimental electrochemistry and theoretical calculations in 2 '-hydroxy chalcones: the role of the intramolecular hydrogen bond
(Royal Soc Chemistry, 2015)
In this work we present a study on the molecular structure and electrochemical behavior of a
series of methoxylated 2'-hydroxychalcones, whose antitumor activity has been previously
described. Cyclic voltammetry was used ...
The intramolecular Heck reaction and the synthesis of indolizidinone, quinolizidinone and benzoazepinone derivatives
(Georg Thieme Verlag KgStuttgartAlemanha, 2002)
Chemoenzymatic Synthesis of Triazololactams Structurally Related to Pancratistatin
(Wiley VCH Verlag, 2017-07-17)
Four tricyclic lactams that structurally resemble alkaloids with the pancratistatin skeleton were synthetized from bromobenzene by a chemoenzymatic strategy. The sequence involved enzymatic dihydroxylation, efficient ...