Appeal No. 1997-2797
Application 08/199,286
APPENDIX
1. A process for the preparation of "-chloromethylene-
triorganylphosphorane derivatives of the formula I
in which the radicals R can be the same or different and
denote C-organic substituents and A stands for cyano or a
group CO-B where B is a C-organic or O-organic radical which
has from 1 to 12 carbon atoms and is inert under chlorination
conditions, by chlorination of phosphoranes of formula II
with chlorine, wherein the chlorination is carried out in the
presence of an alkali metal hydroxide as hydrogen chloride
acceptor and the chlorine and said base are fed to the
reaction mixture concurrently but separately at the rates at
which they are consumed, such that the pH does not rise above
9 thoughout the reaction.
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