Nitrosations with hydrazine derivatives: Synthesis of N4-arenesulfinylsemicarbazides and N5-arenesulfinyl-N1-aminobiuretes from arenesulfinylisocyanates and N,N-disubstituted hydrazines
Arenesulfinyl-isocyanates 5 prepared in situ from arenesulfinyl chlorides 4 and silver cyanate react with N,N-disubstituted hydrazines to mixtures of N4-arenesulfinylsemicarbazides 6 as main components and N5-arenesulfinyl-N1/s
Hanefeld,Landwehr
p. 344 - 351
(2007/10/02)
Nitrosations with hydrazine derivatives. Novel synthesis of arylsulfonyltriazenes by nitrosation of N4-arylsulfonylsemicarbazides
N1-disubstituted N4-arenesulfonylsemicarbazides 3 are prepared by hydrazinolysis of the arenesulfonylurethanes 2, which result from arenesulfonamides and chloroformic acid ester. Under nitrosating conditions 3 are mainly transformed into the sulfonyltriazenes 4.
Hanefeld,Hartmann
p. 672 - 675
(2007/10/02)
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