Factors affecting the competitive reduction of 8,8-dimethylnaphthalene-1,4,5(8H)-trione in a Diels–Alder cycloaddition with hydroxysulfinyldienes

Iriux, Almodovar ; Wilson, Cardona;Tomás, Delgado-Castro; Gerald, Zapata-Torres; Marcos, Caroli Rezende; Ramiro, Araya-Maturana.

Keywords: Diels–Alder, Cycloaddition, Reduction, Quinone, Sulfinyldienes

Abstract

Competing reduction and cycloaddition products were formed in the reaction of 8,8-dimethylnaphthalene-1,4,5(8H)-trione with a hydroxysulfinyldiene. The ratio of reduction to cycloaddition products depended on the stereochemistry of the diene and on the solvent employed, being higher in ethanol than in benzene. The ratio was also affected by the addition of Lewis acids, decreasing in the order BF3 = Al2O3 > MgCl2 > ZnCl2. The results help to explain and predict the occurrence of these competing processes in Diels–Alder cycloadditions involving quinonedienophiles.

Más información

Título de la Revista: JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
Volumen: 11
Número: 4
Editorial: Springer
Fecha de publicación: 2014
Página de inicio: 1021
Página final: 1026
Idioma: Inglés