Buscar
Mostrando ítems 1-10 de 276
CYCLIZATION PROCEDURES TOWARD THE SYNTHESIS OF SOME CONFORMATIONALLY RESTRICTED NITROGEN HETEROCYCLES
(Sociedad Chilena de Química, 2002)
Recent applications of microwave assisted cyclizations promoted by polyphosphoric acid esters to the synthesis of nitrogen heterocycles
(Wiley Blackwell Publishing, Inc, 2020)
Polyphosphoric acid (PPA) esters PPE (ethyl polyphosphate) and PPSE (trimethylsilyl polyphosphate) are mild reagents of the Lewis acid type with a high dehydrating power due to their ability to react irreversibly with ...
Gold-Catalyzed Cycloisomerization of Alkyne-Containing Amino Acids: Controlled Tuning of C–N vs. C–O Reactivity
(Wiley VCH Verlag, 2016-06)
Versatile alkyne-containing amino acids were used as ambident precursors in the divergent synthesis of alkylidenelactones and 1-pyrrolines. Two gold-catalyzed protocols were applied for selective intramolecular O- and ...
Advances in metal-mediated solid-phase synthesis of heterocyclic compounds
(Springer, 2017)
While heterocycles are a key feature frequently found in compounds with pharmaceutical or agrochemical interest, the combination between solidsupported synthesis and organometallic chemistry has demonstrated to be a helpful ...
Traditional and ion-pair halogen-bonded complexes between chlorine and bromine derivatives and a nitrogen-heterocyclic carbene
(AMERICAN CHEMICAL SOCIETY, 2014)
Traditional and ion-pair halogen-bonded complexes between chlorine and bromine derivatives and a nitrogen-heterocyclic
(AMERICAN CHEMICAL SOCIETY, 2014)
Synthesis of some C-3,4,5-substituted 2,6-dimethyl-1,4-dihydropyridines (4-DHPs)
(TAYLOR & FRANCIS INC, 2007)
A series of C-3,4,5-substituted 2,6-dimethyl-1,4-dihydropyridines ( 1,4-DHPs) with pharmacological properties were prepared by a variation from the classical Hantzsch synthesis. The procedure involves treatment of the ...