SEARCH Articles Figures Tables A-Lactone A-Lactones Lactones, a-methylenesynthesis Knoevenagel reaction, Meldrum’s acid Lactones, a-methylenesynthesis Mannich reaction Lactones, a-methylenesynthesis via allyl chromium reagent Lactones, a-methylenesynthesis via dehydrogenation reactions Lactones, a-methylenesynthesis via hydrocarboxylation Y-Lactones, a-methylenesynthesis