process for the production of 5, 5 '- dialkyl - 10, 10' - spiro bis phenazaverbindungen

摘要

The Specification comprises compounds of the formula: FORM:0965481/C1/1 in which Mis, Pb, Ge or Sn and R is a C1 to C5 alkyl radical. These compounds may be prepared by reacting two equivalents of 4,41-dibromo-2,21-dilithio-N-(C1-C5 alkyl) diphenylamine with one equivalent of MX4 where X is chlorine or bromine. These compounds may be reduced by means of a palladium-on-carbon catalyst in the presence of an acid acceptor to produce compounds of the formula: FORM:0965481/C1/2ALSO:The Specification comprises compounds of the formula: FORM:0965481/C3/1 in which M is Si, Pb, Ge or Sn (see also Division C2) and R is a C1 to C5 alkyl radical. These compounds may be prepared by reacting 2 equivalents of 4,41-dibromo-2, 21-dilithio-N-(C1-C5 alkyl) diphenylamine with one equivalent of MX4 where X is chlorine or bromine. These compounds may be reduced by means of a palladium-on-carbon catalyst in the presence of an acid acceptor to produce compounds of the formula: FORM:0965481/C3/2 Examples describe the preparation of (1) (A). 2, 21, 4, 41-tetrabromo -N- ethyl-diphenylamine. 1 (B) 2, 21, 8, 81-tetrabromo-5, 51-diethyl-10, 101-spirobiphenylaziline and 5,51-diethyl-10, 101h spirobiphenylphenazaline.