C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 279/20 (2006.01) C07D 265/38 (2006.01) C07F 5/02 (2006.01)
Patent
CA 2188967
The present invention involves a method for the preparation of substituted 3-(phenylimino)-3H-pheno- thiazines or phenoxazines which method involves reacting phenothiazine or phenoxazine with an aromatic amine in the presence of periodic acid as coupling agent.
Corporation Bayer
Osler Hoskin & Harcourt Llp
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