Robert Maurin

Transpositions thermiques de derives halogenes du dimethylenecyclobutane et du methylenecyclobutene.

Zusammenfassung The title substances are converted by pyrolysis, in fair to excellent yields, into aromatic hydrocarbons.

Thermal rearrangement of halogenated dimethylenecyclobutane and methylenecyclobutene derivatives

Upon heating, dichlorodimethylenecyclobutanes (1, 2, 18) undergo rearrangements that yield benzene derivatives including styrene adducts. Preparation of postulated intermediates (10, 23) and study of their pyrolytic behaviour allow to unambiguously establish the mechanism of formation of the styrene derivatives.