2-ethenyl-1,4-dioxane

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: It has now been found that, by reacting 6-methoxy-2-bromonaphthalene with 3-ethylenedioxybutene (II) in the presence of a bivalent palladium salt and a phosphine, the reaction takes place extremely rapidly without operating under pressure and the 6-methoxy-2-(3-ethylenedioxybuten-1-yl)naphthalene (III) is obtained in optimum yields.