Azo anions in synthesis. t-Butylhydrazones as acyl-anion equivalents

Abstract
The lithium salts of aldehyde t-butylhydrazones react with electrophiles (aldehydes, ketones, alkyl halides) to form C-trapped t-butylazo compounds; isomerisation and hydrolysis gave α-hydroxy ketones and ketones in good yields, thereby providing a convenient new acyl-anion equivalent.

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