C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 487/06 (2006.01) C07C 211/29 (2006.01) C07C 215/50 (2006.01) C07C 217/58 (2006.01) C07D 243/14 (2006.01)
Patent
CA 2096238
- 27 - A b s t r a c t Improved process for the production of compounds of the formula I Image I in which R1 denotes a hydrogen atom or a straight-chained or branched alkyl residue with 1-6 carbon atoms, R2 denotes a hydrogen atom, a straight-chained or branched alkyl residue with 1-6 carbon atoms, a straight-chained or branched alkenyl residue with 3-6 carbon atoms, a C3-C6 alkynyl residue, a C3-C6 cycloalkyl residue or a C1-C6 alkyl residue, which can in addition be substituted by a phenyl residue or a C3-C6 cycloalkyl residue, R3 and R4 are the same or different and denote, independently of each other, hydrogen, halogen, hydroxy, C1-C6 alkoxy, C1-C6 alkyl or amino, - 28 - as well as intermediate products having the formulae IV and VI Image IV VI in which R1, R3 and R4 have the stated meanings and Y denotes a halogen atom, for the production of compounds of the formula I.
Leinert Herbert
Mertens Alfred
Boehringer Mannheim Gmbh
Leinert Herbert
Mertens Alfred
Swabey Ogilvy Renault
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