SEARCH Articles Figures Tables Carb-34. Replacement of Ring Oxygen by Other Elements Replacement of carbonyl oxygen by fluonne Replacement of carbonyl-oxygen Replacement of halogen by carbonyl-oxygen Replacement of halogen by carboxyl-oxygen Replacement of halogen by oxygen Replacement of hydrogen by carboxyl-oxygen Replacement of nitrogen by carbonyl-oxygen Replacement of nitrogen by carboxyl-oxygen Replacement of nitrogen by oxygen Replacement of oxygen by deuterium Replacement of oxygen by hydrogen Replacement of oxygen by phosphorus Replacement of oxygen by sulfur groups Replacement of oxygen in carboxyl or alkoxycarbonyl groups Replacement of sulfur by oxygen