Tetrahedron Letters Vol. 21, pp 2425 - 2428 @Pergamon Press Ltd. 1980. Printed in Great Britain ... TRANSPOSITIONS THERMIQUES MRTHYLENECYCLOBUTENE. DE DERIVES HALOGENES DU DIMETHYLENECYCLOBUTANE ... Robert Maurin, Christian Piscot et Zoubida Charrouf-Chafchaouni ... Laboratoire de Chimie, Universite Hassan II, Faculte de Mgdecine,l9, Rue Tarik Ibnou Zyad, Casablanca, MAROC. Summary: The title substances ...