Zobrazeno 1 - 10
of 29
pro vyhledávání: '"M. Carmen Sanudo"'
Autor:
Alfonso González-Ortega, Mónica Pérez Perrino, Luis Calvo, M. Carmen Sanudo, Rafael del Villar-Guerra
Publikováno v:
Tetrahedron. 66:2815-2822
A wide library of 3,7,8,8a-tetrahydro-2H-thiazolo[3,2-a]pyridines has been prepared by simple heating in acetonitrile of β-enaminonitriles, α,β-unsaturated aldehydes and 2-aminothiol hydrochlorides. Chemical yields depend on the nature, hindrance,
Publikováno v:
Tetrahedron. 64:3691-3700
A wide library of 2,3,4,7-tetrahydro[1,4]thiazepines have been prepared by simple heating of thiazolidine and β-enaminonitrile derivatives in acetonitrile. The procedure, whose yields depend on the nature and position of the substituents, gave good
Publikováno v:
Synthesis. :2450-2456
Weinreb 3-(pyrrolidin-2-ylidene)propionamides and Weinreh N-vinylprolinamides were used for the synthesis of 2,3-di-hydropyrrolizines. The selective reaction of the carboxamide group with organometallic compounds allowed us to obtain a great variety
Publikováno v:
Tetrahedron Letters. 42:8981-8984
Silyl β-enaminones have been synthesized by reductive cleavage of silylisoxazoles. These versatile synthons bearing the silyl group in different positions of the enamino ketonic system are of great interest in the construction of a variety of penta-
Publikováno v:
Synthesis. 2001:1941-1948
Publikováno v:
Tetrahedron. 55:13211-13224
N(α)-(2-Oxo-2H-1-benzopyran-4-yl)Weinreb-α-aminoamides were prepared from 4-chlorocoumarin and α-aminoacid derivatives. Their reaction with organometallic compounds (RLi or RMgBr) and subsequent cyclization of ketones thus obtained, give [1]benzop
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :4061-4066
β-Aminoenones react with monoalkyl hydrazines to give regioselectively 1,3,5-trisubstituted pyrazoles. The mechanism and level of regioselectivity depend on both the substitution pattern of the substrates and the reaction conditions. When the least
Publikováno v:
Journal of Heterocyclic Chemistry. 30:467-471
The synthesis of 3-substituted 5-arylisoxazoles from oximes of α,β-unsaturated ketones is studied. The formation of the isoxazole derivatives takes place by cyclization of oximes in the presence of iodine and potassium iodide. The presence of isoxa
Autor:
Luis Calvo, J. Manuel Bañez, Angel Alberola, M. Teresa Rodríguez Rodríguez and, M. Carmen Sanudo
Publikováno v:
Journal of Heterocyclic Chemistry. 30:461-465
The reactions of the 3-methyl group in 5-aryl-2,3-dimethylisoxazolium tetrafluoroborates with aromatic aldehydes, in the presence of piperidine were studied. Isoxazolium salt reactivity is independent of the phenyl group substituent at C-5 on the iso
Autor:
Rafael del Villar-Guerra, Alfonso González-Ortega, Monica Perez‐Perrino, Luis Calvo, M. Carmen Sanudo
Publikováno v:
ChemInform. 41
Although the synthetic interest for the multicomponent preparation of the title thiazolopyridines is evident, the stereochemical control is rather low.