“…Many papers have been published since that time showing the wide application of this reaction to the preparation of new compounds unobtainable by other methods-for example, from terpenes, sterols, bile acids, heterocyclic nitrogen compounds, unsaturated hydrocarbons, aldehydes, and ketones. Several reviews on this subject have been published recently (40,48,59,68,79,81,125). In general, selenium dioxide oxidations take place as follows: in compounds containing methylene or methyl groups, activated by an adjacent double bond, carbonyl or aldehyde group, or adjacent benzene nucleus, the activated group is oxidized to the corresponding ketone or aldehyde group.…”