C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/305, 260/314
C07D 233/62 (2006.01) C07D 233/54 (2006.01) C07D 401/00 (2006.01) C07D 403/04 (2006.01) C07D 405/00 (2006.01) C07D 405/04 (2006.01) C07D 455/04 (2006.01) C12Q 1/28 (2006.01)
Patent
CA 1259997
ABSTRACT New redox indicators The present invention provides imidazole derivatives of the general formula:- (I) Image wherein R is a hydrogen atom, a tetrahydrofuranyl, cycloalkyl or alkyl radical, which can be substituted by hydroxyl, alkoxy, a sulphuric acid, phosphonic acid or carboxylic acid residue, as well as by a phenyl radical, and R1 and R2, which can be the same or different, are julolidine radicals, tetrahydroquinoline radicals, which optionally carry on the nitrogen atom an alkyl radical which, in turn, can be substituted by a sulphuric acid, phosphonic acid or carboxylic acid residue, or radicals of the general formula:- Image in which R4 is a hydroxyl or amino group or a mono- or dialkylated amino group, in which the alkyl radicals can carry a sulphuric acid, phosphonic acid or carboxylic acid residue, and R3 and R5, which can be the same or different, are hydrogen atoms or alkyl or alkoxy radicals which are optionally substituted by a carboxyl group, with the proviso that R1 and R2 cannot simultaneously be julolidine or tetrahydroquinoline and at least one R4 of the substituents R1 and R2 must be a hydroxyl group, as well as the salts thereof. The present invention is also concerned with processes for the preparation of these imidazole derivatives and with the use thereof as redox indicators.
477853
Deneke Ulfert
Guthlein Werner
Kuhr Manfred
Merdes Hartmut
Murawski Hans-Rudiger
Boehringer Mannheim G.m.b.h.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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