... 70,2971 (1948). 37 EH Rodd, Chemistry of Carbon Compounds Vol. 1 A, p. 531 (Amsterdam 1951). ... The synthesis of lactones. Part I 86 (1967) RECUEIL 489 4. 4,l. Synthesis from 2,5-dialkylcyclopentaiiones 4.1.1. Preparation of 2,5-dialkylcyclopentanones by double aldol ...