Substd. hydrazine and azo-alkyl- or aryl cpd. synthesis - by anodic oxidn. of anions of di:alkyl- and di:aryl sulphamide or alkyl-or aryl-aminosulphonic acid derivs.

摘要

N,NN'-dialkyl and -diaryl-sulphamides, (I), and N-alkyl- and N-aryl-aminosulphonic acids, (II), are used as starting materials in the anodic synthesis of azoalkanes and N,N'-dialkyl-hydrazines in protic solvents, e.g. water, MeOH, EtOH and other alcohols. The anodic oxidn. of the N-anions of (I) and (II) in protic solvents takes place in opt. divided cells, using anodes of stable material, e.g. magnetite, C or Pt. Prods. are azoalkanes, N,N'-dialkyl- or diaryl-substd. hydrazine-N,N'-disulphonic acids or their dianions. In an exampe, 0.02 mol. N,N-dicyclohexylsulphamide were dissolved in 100 ml MeOH and converted to the N-anion by adding 0.04 mol MeOLi. Oxidn. in the undivided thin layer cell, fitted with a steel cathode and a C anode, formed azocyclohexane in 90% yield and 65-75% current yield.