Willgerodt–Kindler reaction of arylglyoxal hydrates with secondary amines and elemental
sulfur under solvent-free conditions at 80 °C is developed, in which α-ketothioamides
are obtained in 70–90% yield in 0.6–1 hour. The X-ray crystal-structure analysis for
one compound was obtained.
Key words
α-ketothioamides - Willgerodt–Kindler reaction - arylglyoxals - green chemistry -
solvent-free