vol 13 May-August 2007, 1-65

Contents

Synthesis of substituted allylic alcohols via palladium-catalized hydrostannation M. Belén Faraoni, Darío C. Gerbino and Julio C. Podestá	1
Preparation of berberrubine. Chemistry and Biological activity Matías Arana and Mónica Freile	4
A new method for the synthesis of Quinoxaline derivatives Javier H. Gris, Martín A. Dragonetti, Albertina G. Moglioni and Beatriz M. Fernández	8
Synthesis of a 4-norsteroid precursor of brassinosteroids Sofía Acebedo, Javier Ramírez and Lydia Galagovsky	10
Synthesis de alkoxy and aryloxyphthalonitriles key precursors for the synthesis of substituted phthalocyanines María C. García Vior, Ana C. Monsalvo and Josefina Awruch	12
Synthesis de alkoxy and aryloxyphthalonitriles key precursors for the synthesis of substituted phthalocyanines María C. García Vior, Ana C. Monsalvo and Josefina Awruch	14
Addition of dibutyltin chlorhydride on unsaturated diesters of taddol Darío C. Gerbino, Liliana C. Koll, Sandra D. Mandolesi and Julio C. Podestá	16
Synthesis of quinoxalines and benzoquinoxalines with potential pharmacologic activity Romina Julieta Glisoni, Beatriz M. Fernández and Albertina G. Moglioni.	19
Racionalization of the reaction routes involved in intramolecular cyclizations of δ-hydroxynitriles induced by triflic anhydride Valeria Justribó, Silvina C. Pellegrinet and María I. Colombo	22
Total synthesis of n-methyl-n-formyltyramine, a new β-phenethylamide derivative isolated from Cyathobasis fruticulosa (Bunge) Aellen Enrique L. Larghi and Teodoro S. Kaufman	26
Studies on the preparation of unsaturated carbonyl substrates for solid-phase synthesis of peroxidic compounds Agustina La Venia, Ernesto Mata and Mirta Mischne	30
Use of copper (ii) salts in solid phase as deprotection method of thioacetals and thiocetals G. Oksdath Mansilla and A. B. Peñéñory	33
Synthesis in high vacuum and synthesis in the absence of solvent. Two new options for obtaining β-styryl phosphonic acid E. Mascaró, O. I. Pieroni, B. M. Vuano and A. E. Ciolino	36
Comparison of divergent vs. convergent approaches for solid-phase synthesis of methylenedioxychalcones Paola A. Cuervo, Ernesto G. Mata, Rodrigo Abonía, Jairo Quiroga and Braulio Insuasty	39
Thermal decomposition of trioxanes in solution of 1,4-dioxane Carmen M. Mateo, Karina Nesprias, Adriana I. Cañizoand Nora Eyler	43
New strategies for solid-phase synthesis of polysubstituted 2-azetidinones Luciana Méndez, Sebastián A. Testero and Ernesto G. Mata	45
Kinetic study of the thermal decomposition reaction of pinacolone diperoxide in the presence of styrene Celedonio Minellono, Elida E. Alvarez and Gladys N. Eyler	47
Synthesis of ^131I and ^99mTc labelled compounds of indoleacetic acid and derivatives. study of their properties as brain radiotracers Arturo A. Vitale, Carlos O. Cañellas, Jorge Ciprian-Ollivier, Silvia G. de Castiglia and Alicia B. Pomilio	50
Synthesis of esters derived from C2-symmetric chiral diols Flavia C. M. Zacconi, Liliana C. Koll and Julio C. Podestá	53
On double-level orthogonal dynamic combinatorial libraries: Compatibility of hydrazone and disulfide bridge exchange Andrea M. Escalante, A. Gastón Orrillo and Ricardo L. E. Furlán	56
Selenophene derivatives as dienophiles in diels-alder reactions Claudia Della Rosa, Maia Lescano, Pedro Mancini and Maria Kneeteman.	59
Synthesis of the carbonated skeleton of stephaoxocanidine Andrea B. J. Bracca and Teodoro S. Kaufman	61
Chemical characterization of Citrus sp. Petitgrain from jujuy Carmen Viturro, Ana Molina and Walter Villa	64