Abstract
A mesoionic‐nitrosotetrazolium‐catalyzed aerobic oxidation of alcohols is reported. In the presence of catalytic amounts of 5‐nitroso‐1,3‐diphenyltetrazolium tetrafluoroborate (5 mol‐%) and nitric acid (20 mol‐%), a wide range of alcohols are oxidized to the corresponding aldehydes and ketones in yields of 53–100 % at room temperature under ambient air or oxygen conditions. This oxidation shows a strong preference for secondary alcohols over primary alcohols; sterically hindered alcohols are also smoothly oxidized. A mechanism involving a nitroso/NOx catalytic cycle is proposed.
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