Oxidative cleavage of olefins to aldehydes by the usual oxidants

Oxidative cleavage of olefins to aldehydes by the usual oxidants 

Aldehydes can also sometimes be obtained from olefins by oxidation with chromic acid or nitric acid, e.g., acetylvanillin from isoeugenol.111 

A special case is the formation of o- and / -hydroxybenzaldehydes from the appropriate arylethylene derivatives by means of nitrobenzene and alkali, e.g., the production of vanillin from isoeugenol by two hours heating with nitrobenzene and 2N-sodium hydroxide solution at 180° under pressure 112 

---