1.7.7.3 Oxidation of C-C Multiple Bonds

C-C multiple bonds could be oxidized by the singlet oxygen to give the corresponding carbonyl compounds or carboxylic acids depending on the nature of the compounds (Scheme 20).

Scheme 20

C-N double bond of nitronate can be oxidized to the corresponding carbonyl compound (Scheme 21).

Scheme 21

1.7.7.4 Oxidative Decarboxylation

The carboxylic acids having α-carbonyl groups can undergo oxidative decarboxylation to give carboxylic acid (Scheme 22).

Scheme 22

 

1.7.7.5 Oxidative Cyclization

Oxidative cyclization of chalcone with singlet oxygen gives flavanol (Scheme 23).

Scheme 23