C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/566
C07C 47/24 (2006.01)
Patent
CA 1140591
ABSTRACT OF THE DISCLOSURE The disclosure describes a process for preparing difluoromethoxy derivatives of aromatic aldehydes having a common formula: Image wherein: Ar represents an aromatic radical selected from the group consisting of the benzene and naphthalene rings; n is an integer which is 1 or 2. The above- mentioned process comprises the interaction between corres- ponding mono- or dihydroxy derivatives of aromatic aldehydes and difluoro-chloromethane at 60-70°C in the presence of caustic alkali taken in an amount of 6 to 10 moles per 1 mole of starting hydroxyaldehyde derivative. This process simplifies the preparation of difluoromethoxy derivatives of aromatic aldehydes and, at the same time, increases the yield of the end products.
351084
Fialkov Jury A.
Shelyazhenko Svetlana V.
Institut Organicheskoi Khimii Akademii Nauk Ukrainskoi Ssr
Swabey Ogilvy Renault
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