Amidoximes ureas

Beckmann rearrangement of amidoximes to urea derivatives in the presence ol acids (benaene suMonyl chloride). 

Amidines and amidoximes react with carbon disulfide and a mixture of carbon disulfide and sulfur to afford 5-mercapto-l,2,4-thiadiazole derivatives (Scheme 46 and Equation (29)). The latter compounds are also obtained when xanthogenic acid 0-esters react with ureas in the presence of sulfur <89JAP(K)01308270). 

The rearrangement of amidoximes to derivatives of urea is called the Tiemann Rearrangement. 

Poly phosphoric acid Beckmann rearrangement Ureas from amidoximes... 

The Tiemann Reaction. Amidoximes undergo rearrangement to s-ureas when treated first with benzenesulfonyl chloride and then with water. This is the Tiemann reaction, which has so far been pri-... 

Treatment of amidoximes, derived from amides and hydroxylamine, with ben-zenesulfonyl chloride and water leads to ureas. 

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