Synthesis of α-Ketothioamides via Willgerodt-Kindler Reaction of Arylglyoxals with Amines and Sulfur under Solvent-Free Conditions
摘要:
Willgerodt-Kindler reaction of arylglyoxal hydrates with secondary amines and elemental sulfur under solvent-free conditions at 80 degrees C is developed, in which alpha-ketothioamides are obtained in 70-90% yield in 0.6-1 hour. The X-ray crystal-structure analysis for one compound was obtained.
A simple and efficient method for the synthesis of α-ketothioamides via the Willgerodt–Kindlerreaction is developed. Reactions were carried out between arylglyoxal hydrates, amines and elemental sulfur in water at 80°C to afford corresponding α-ketothioamides in good to high yields in a short reaction time.