A new reaction of α-chloro-α-chlorosulfenyl ketones: facile syntheses of 3,3-dichloro- and 3-chloro-chroman-4-ones and thiochroman-4-ones-Science-Chemical Encyclopedia-lookchem

A new reaction of α-chloro-α-chlorosulfenyl ketones: facile syntheses of 3,3-dichloro- and 3-chloro-chroman-4-ones and thiochroman-4-ones
Add time:07/16/2019 Source:sciencedirect.com

3-Chloro-3-chlorosulfenylchroman-4-ones are efficiently obtained from chroman-4-ones by treatment with thionyl chloride. Direct oxidation affords 3,3-dichlorochroman-4-ones, whilst conversion to the sulfenamides prior to oxidation provides a facile route to 3-chlorochroman-4-ones.

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