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US 6,603,007 B1Granted
Bipyridyl derivatives
AssigneeSankio Chemical Co., Ltd.
InventorTaichi Shintou
Life of this patent
Estimating the term…
Abstract
Provided are novel specific dipyridyl derivatives as a useful substance or an intermediate in the fields of pharmaceuticals, agrichemicals, ligands, silver halide photosensitive materials, liquid crystals, surfactants, electrophotography and organic electroluminescence.
Claims7
A dipyridyl compound represented by the following formula (A):
- wherein A1 and A2 may be the same or different and each represents an alkyl group;
- A1 and A2 may be coupled together to form a ring;
- and A3 represents one of the following structures:
- wherein A4 and A5 may be the same or different and each represents a hydrogen atom, an alkyl group or an aryl group.
1 more element
A dipyridyl compound represented by the following formula (B):
- wherein one of B1 and B2 represents a hydrogen atom, and the other represents an alkyl or aryl group, and B3 and B4 may be the same or different and each represents a hydrogen atom, an alkyl group or an aryl group,
- with the proviso that when B3 and B4 simultaneously represent a hydrogen atom, the following cases are excluded:
- (i) one of B1 and B2 represents an alkyl group having 3 or less carbon atoms, and
- (ii) B1 represents a phenyl group, and
- with the further proviso that when B2 represents a hydrogen atom, the following case are excluded:
- (i) each of B 1 and B3 (substituted at the 6-position) represents a phenyl group and B4 represents a hydrogen atom, or
- (ii) B 1, B3 (substituted at the 2-position) and B4 (substituted at the 6-position) each represents a methyl group.
4 more elements
A dipyridyl compound represented by the following formula (C):
- wherein one of C1 and C2 represents a hydrogen atom and the other one represents an alkyl or aryl group;
- and C3 and C4 may be the same or different and each represents a hydrogen atom, an alkyl group or an aryl group, with the proviso that when C3 and C4 simultaneously represent a hydrogen atom, C1 or C2 does not represent a methyl group.
Dependencies are inferred from the claim text.