Appeal No. 94-3474
Application 07/956,126
Davis discloses photochlorination of methylaromatic
compounds such as toluene or toluenesulfonyl chloride by a free-
radical mechanism in which the methylaromatic compound is reacted
with chlorine and an accelerating amount of bromine in the
presence of UV radiation at a temperature between 0E and 200EC.
(col. 1, lines 30-35; col. 6, lines 18-24). Again, in describing
the chlorination process, Davis, like Kobayashi, specifically
recites that the process is conducted in the presence of UV
radiation (col. 5, lines 8-63). Each of Davis’ examples also
explicitly requires a source for UV radiation, e.g a sunlamp or a
UV bulb (see Examples I-VII). According to Davis, the source of
the UV radiation can be natural sunlight or an artificial UV
radiation source (col. 5, lines 56 and 57).
Klauke discloses chlorinating 2,4-dichloro-5-fluorobenzoyl
chloride to produce 2,4-dichloro-5-fluoro-1-trichloromethyl-
benzene by reacting the benzoyl chloride compound at 110E to
160EC. under UV irradiation (col. 3, lines 5-10 and claim 8). In
each of the examples describing the chlorination process, Klauke
explicitly recites using UV irradiation (see Examples 3 and 4).
Döscher discloses chlorinating methylaromatic compounds such
as 2,4-dibromo-5-fluorotoluene or 4-methylbenzoyl chloride to
give 2,4-dichloro-5-fluoro-benzotrichloride or 4-trichloro-
9
Page: Previous 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Next
Last modified: November 3, 2007