Percorrer por data de Publicação, começado por "2013-03-20"
A mostrar 1 - 1 de 1
Resultados por página
Opções de ordenação
- Functionalization of dipyrromethanes via hetero-Diels–Alder reaction with azo- and nitrosoalkenesPublication . Pereira, Nelson A. M.; Lemos, A.; Serra, Arménio C.; Melo, Teresa M. V. D. Pinho e5,50-Diethyl- and 5-phenyldipyrromethanes participate in cycloadditions with azo- and nitrosoalkenes giving dipyrromethanes with side chains containing open chain oximes and hydrazones. By controlling reaction stoichiometry it is possible to get mono or 1,9-disubstituted derivatives. The reported methodology gave access to a range of dipyrromethanes with good structural features for various applications. It was demonstrated that reduction of dipyrromethanes containing a-oximino ester groups opens the way to new a-amino esters.