Appeal No. 2001-0934 Page 2
Application No. 09/294,483
Claim 1 is illustrative of the subject matter on appeal and is reproduced
below:
1. A process for preparing an alkylthio-and/or arylthio-substituted
diketo-diaryl-pyrrolopyrrole (DPP) of the formula la or a dithio-
bridged bis-diketo-diaryl-pyrrolopyrrole (bis-DDP) of the formula lb
in which in formula la
G is phenyl substituted by at least one arylthio or alkylthio group,
and
G1 is G or a carbocyclic or heterocyclic radical, by reacting a
haloaryl with a thiol or thiolate, and in formula lb
G5 is a phenylene, G6 is G1 but not G, and G7 is alkylene,
cycloalkylene or phenylene, by reacting two haloaryls with a dithiol or dithiolate,
which comprises
reacting a thiol or thiolate with a halo-diketo-diaryl-pyrrolopyrrole
(“halo-DPP”) of the formula lla
in which
G2 is a halogenated phenyl group and G3 is G2 or G1, or
reacting a dithiol or dithiolate with two halo-diketo-diaryl-
pyrrolopyrroles (“halo-DPPs”) of the formula llb
Page: Previous 1 2 3 4 5 6 7 8 9 Next
Last modified: November 3, 2007