Zobrazeno 1 - 10
of 28
pro vyhledávání: '"H. Rodriguez Ramos"'
Autor:
Nelson Alomoto, Filomena Jordão, H. Rodriguez Ramos, E. Tejera, Antonio Franco-Crespo, D.C. Terra de Andrade, Valentina Ramos
Publikováno v:
INTED Proceedings.
Autor:
Jesus H. Rodriguez Ramos, Ana M. Martin Castro, M. Ángeles Fernández-Ibáñez, Ana C. Rubio Flamarique, José L. García Ruano
Publikováno v:
Tetrahedron: Asymmetry. 13:1321-1325
The opening of the oxirane ring of glycidamides with Et 2 AlCN takes place under mild conditions in a completely regio- and stereoselective manner to afford β-cyano carboxamide derivatives, which are immediate precursors of mono- and disubstituted m
Autor:
Jesus H. Rodriguez Ramos, José L. García Ruano, Fernando R. Clemente, and Ana M. Martín Castro, Ruth Gordillo, Lorena Gonzalez Gutierrez
Publikováno v:
The Journal of Organic Chemistry. 67:2926-2933
The theoretical study reported in the present work deals with chiral cyclic vinyl sulfilimines and their reactivity as dienophiles in [4 + 2] cycloaddition reactions, using B3LYP/6-31G(d)//AM1 and B3LYP/6-31G(d)//B3LYP/6-31G(d) model chemistries. Con
Publikováno v:
Heteroatom Chemistry. 13:453-462
By analysis, the advantages and drawbacks of the differently substituted vinyl sulfoxides so far reported, (Z)-3-p-tolylsulfinyl acrylonitriles are proposed as the best sulfinyl dienophiles. The stereoselective synthesis of these compounds was optimi
Publikováno v:
Tetrahedron: Asymmetry. 10:4607-4618
The DIBAL reduction of enantiomerically pure α-sulfinyl ketimines can be achieved almost completely stereoselectively under ZnX2 catalysis, regardless of the alkyl or aryl substituent at nitrogen and the aliphatic (cyclic or acyclic) or aromatic cha
Publikováno v:
Tetrahedron Letters. 39:9765-9768
A new entry to optically pure aziridines from N-p-methoxyphenyl derivatives of 2-p-tolylsulfinylketimines is reported. The highly stereoselective reduction of the imines with DIBAL-H/ZnX2 yielded the corresponding sulfinyl amines, which can be transf
Publikováno v:
Tetrahedron: Asymmetry. 9:2437-2450
Two different methods to obtain enantiomerically pure N -alkyl and N -aryl α-sulfinyl ketimines are reported. Reaction of enantiomerically pure α-sulfinyl ketones ( 1 – 6 ) with benzylamine or p -methoxyaniline, in the presence of molecular sieve
Autor:
Inmaculada Fernández, Jesus H. Rodriguez Ramos, Ana M. Martin Castro, José L. García Ruano, Marta Cifuentes García
Publikováno v:
Tetrahedron: Asymmetry. 9:859-864
Diastereoselective hydrocyanation of enantiomerically pure 2- p -tolylsulfinylacetaldehyde and 2- p -tolylsulfinylpropanal with Et 2 AlCN catalyzed by ZnBr 2 is described. The sulfur configuration controls the stereochemical course of the reaction. H
Autor:
José L. García Ruano, Jesus H. Rodriguez Ramos, Ana C. Rubio Flamarique, Ana M. Martin Castro
Publikováno v:
Tetrahedron: Asymmetry. 8:3503-3511
The title compounds were efficiently prepared from 1-alkyl(or phenyl)-2-methyl-2-(tolylsulfinyl)ethanone through a simple four-step sequence: highly stereoselective hydrocyanation with Et 2 AlCN (key step to control the stereochemistry); hydrolysis t
Publikováno v:
Tetrahedron Letters. 37:4569-4572
Conditions to achieve reductive hydrolysis of β-cyanosulfoxides into their corresponding β-sulfenylamides are reported. The anchimeric assistance of the sulfinyl oxygen in the hydrolysis of the cyano group is proposed to explain the mild conditions