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Die Synthese des o‐Methoxyphenyl‐, o‐Hydroxyphenyl‐ und des o‐Amino‐phenylarsins aus den entsprechenden Arsonsäuren durch elektrochemische Reduktion im präparativen Maßstab wird beschrieben. Die Ausbeuten betragen 65–75%.

Die elektro‐ r chemische Reduktion von (I) führt zum Grundkörper (IIa) der o‐Aminophenylarsine (II), die als ölige und stark luftempfindliche Flüssigkeiten anfallen.

Reactions of a Technical Fraction of Butene with Trichloroacetaldehyde In pyrolysis plants for gasoline production a C4‐fraction is formed containing isobutene, but‐1‐ene and but‐2‐ene as main products. The reactive separation of this fraction represents an industrial problem. One way to solve this problem is the reaction of trichloroacetaldehyde with these components to form addition products. The favoured reaction is the formation of 1,1,1‐trichloro‐4‐methyl‐pent‐4‐en‐2‐ol (1) and 1,1,1‐trichloro‐4‐methyl‐pent‐3‐en‐2‐ol (2) from iso‐butene. The other isomers react very slowly. The influence of different reaction parameters was investigated to find a method for a reactive separation of the C4‐fraction.