| abstract |
cpds. of formula (I): (where R is lower alkyl and X is H, OH, NH2 or a group OR', SR', NHR' or NR'R" in which R' is lower alkyl or opt. subst. phenyl and R= is lower alkyl or opt. selectively debrominated by electrolysing in alkaline medium in an electrolytic cell divided by a diaphragm (cathode pref. Cu, Ni or Pb; cathode-chamber solvent pref. A water/lower alcohol mixture) to give debromo-cpds. of formula (II), some of which are known cpds. (IIe are useful as pesticides (esp. insecticides, acaricides and herbicides) and intermediates for pesticides. |