EUCHEM Conference on Tycloadditions and Related Reactions: Theory and Practice” Vulcano Island, Italy, 21-24 June, 1995 Address for Correspondence: Prof. Mario Gattuso - Universith di Messina Dpt di Chimica Organica e Biologica - Salita Spemne 31, S. Agata 98166 MESSINA, Italy - FAX +39 90 392840EUCHEM Conference on Tycloadditions and Related Reactions: Theory and Practice” Vulcano Island, Italy, 21-24 June, 1995 Address for Correspondence: Prof. Mario Gattuso - Universith di Messina Dpt di Chimica Organica e Biologica - Salita Spemne 31, S. Agata 98166 MESSINA, Italy - FAX +39 90 392840