An easy access to 2-oxohydrazones via electrophilic α-p-tolylhydrazonylation of ketone enolates with tert-butyl p-tolylazo sulfide
摘要:
The title reaction conveniently furnishes, as the sole or main products, alpha-(p-tolylhydrazono)ketones or their N-methylderivatives (H+ or Mel quenching of the final mixture, respectively). Although the method fails with ketones having a secondary alkyl group bonded to the carbonyl, yields are otherwise more than satisfactory and particular interest is attached to the hydrazonylation of the methyl group in methyl ketones.
An easy access to 2-oxohydrazones via electrophilic α-p-tolylhydrazonylation of ketone enolates with tert-butyl p-tolylazo sulfide
摘要:
The title reaction conveniently furnishes, as the sole or main products, alpha-(p-tolylhydrazono)ketones or their N-methylderivatives (H+ or Mel quenching of the final mixture, respectively). Although the method fails with ketones having a secondary alkyl group bonded to the carbonyl, yields are otherwise more than satisfactory and particular interest is attached to the hydrazonylation of the methyl group in methyl ketones.