THE SYNTHESIS OF LACTONES. Part 111 8-Enollactones and lactones with exocyclic double bonds ... BY Miss P. HAVERKAMP BEGEMANN, V. LAMBERTI, and W. T. WELLER (Unilever Research Laboratories at Vlaardingen, The Netherlands and Port Sunlight, England; Lever Brothers Company Research and Development Division, Edgewater, NJ, USA) ... A series of 4-alken-Solides has been prepared by dehydration of the corresponding 5-oxoalkanoic ...