... SYNTHESIS OF a-ALKYLIDENE-y-LACTONES BY INTRAMOLECULAR ADDITION OF ALKOXYCARBONYL FREE-RADICALS TO ACETYLENES Mario D. Bachi' and Eric Bosch Department of Organic Chemistry, The Weizmann lnstitote of Science, Rehovot, Israel Abstract:a-Alkylidene-y-lactones are obtained by treatment of chloroformate and selenocarbonate de- ... Perkin Trans 7 1980, 1207. 9. Barton, DHR; Crich, D.; Ltibberding, A.; Zard, SZ J. Chem. ...