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Succinimido enaminonas foram sintetizadas através da reação de enaminonas e a N-(p-toluil)-maleimida em rendimento moderado a bom. A ação antibacteriana destes compostos contra E. coli e S. aureus foi avaliada, mas a atividade antibacteriana não foi significativa. A regioquímica das succinimido enaminonas foi racionalizada empregando-se a teoria dos orbitais moleculares de fronteira. A estrutura cristalina de um dos compostos foi determinada e foram observadas várias pontes de hidrogênio inter-e intramolecular do tipo NH...O e CH...O.The reaction of N-(p-tolyl)-maleimide with enaminones afforded succinimide-containing enaminones in moderate to good yields, and these compounds were evaluated against E. coli and S. aureus, but no significant antibacterial activity was observed. The regiochemistry of the compounds was examined mechanistically within frontier molecular orbital considerations. In the solid state three-dimensional structure there is the formation of cooperative inter-and intramolecular NH...O and CH...O hydrogen bonding.

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For Abstract see ChemInform Abstract in Full Text.

A simplified technique for the isolation of lignoid mixtures in plant leaves has been developed. The technique provides an economic and rapid means for the determination of the most abundant lignoid skeleton by proton magnetic resonance spectroscopy as well as a method of screening small or large quantities of plant leaves for lignoids.

A simplified technique for the isolation of lignoid mixtures in plant leaves has been developed. The technique provides an economic and rapid means for the determination of the most abundant lignoid skeleton by proton magnetic resonance spectroscopy as well as a method of screening small or large quantities of plant leaves for lignoids. © 1997 by John Wiley & Sons, Ltd.