Producción Científica Profesorado

Comparative Structural Characterization of the Biquaternized N-CH3 and N-BH3 Derivatives of the cis-Cyclen and cis-Cyclam Condensation Products with Glyoxal



Rojas Lima, Susana

2000

Susana Rojas-Lima, José Norberto Farfán García, Rosa Luisa Santillán Baca, María Dolores Castillo, Martha Elena Sosa-Torres, Herbert Höpfl. "Comparative Structural Characterization of the biquaternized N-CH3 and N-BH3 Derivatives of the cis-Cyclen and cis-Cyclam Condensation Products with Glyoxal". Tetrahedron, 56, 6427-6433 (2000). DOI: http://dx.doi.org/10.1016/S0040-4020(00)00614-1


Abstract


The biquaternized N-CH3 and N-BH3 derivatives of the cis-cyclen (1,4,7,10-tetraazacyclododecane) and cis-cyclam (1,4,8,11-tetraazacyclotetradecane) condensation products with glyoxal have been prepared and structurally characterized by NMR spectroscopy and in the case of the BH3 adducts additionally by X-ray crystallography. A comparison of the structural data between the four compounds and the starting materials permitted: (i) to establish their overall conformation, (ii) to discuss the structural modifications caused by the N-CH3 and N-BH3 functional groups and (iii) to understand, why the bialkylated tetraazapolycycles can be reduced to the cross-bridged tetraazamacrocycles, in contrast to the borane adducts.



Producto de Investigación




Artículos relacionados

An efficient potassium cyanide-promoted synthesis of 2-arylbenzoxazoles from [4.3.0]boron heterobicy...

Et3B, an Efficient Mediator for Xanthate Transfer Based Radical Processes

Stereoselective addition of allylmagnesium chloride to the CN bond of [4.3.0] boron heterobicycles

A practical access to acyl radicals from acyl hydrazides

Diastereoselective Synthesis of Spiro-?-lactams via Staudinger Reactio

Structure-Activity Relationships for Inhibition of Cysteine Protease Activity and Development of Pla...

Study of the reactivity of squarylferrocenes. Addition of amines and aminoesters

Enantioselective synthesis of ?-amino acids. Part 10: Preparation of novel ?,?- and ?,?-disubstitute...

X-ray crystallographic study of neutral boron chelates with ?-diketones and tropolone

Diastereoselective alkylation of chiral glycinate derivatives containing the ?-phenylethyl group.