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■ The Reactivity of 2-Fromylthiophene, 1-Methyl-2-formylpyrrole, Benzaldehyde and 2-Formylfurane N,N-Dimethylhydrazones with Dimethyl Acetylenedicarboxylate

M. Eugenia Gonzalez, Pedro Sancho, Concepción Soriano, Rafael Ballesteros, Belén Abarca, and José Sepúlveda

*Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, Calle Dr. Moliner, 50, E-46100 Burjassot (Valencia), Spain

Abstract

N,N-Dimethylhydrazones derived from 2-formylthiophene, benzaldehyde, and 1-methyl-2-formylpyrrole react with dimethyl acetylenedicarboxilate (DMAD),giving the corresponding nitrlies. The reaction with furfural N,N-dimethylhydrazone takes place the intermediacy of a Diels-Alder adduct with the furan ring.