Dianilinoglutacondialdehyde compound and process for the preparation thereof
AssigneeFuji Photo Film Co., Ltd.
InventorToru Harada
Life of this patent
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Abstract
A dianilinoglutacondialdehyde compound is described, which is represented by the following formula (Ia) or (Ib): ##STR1## wherein R.sup.1 and R.sup.2 each represents an alkyl group or an aryl group and may be connected to each other; R.sup.3 represents a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom; R.sup.4 and R.sup.5 each represents a hydrogen atom or a non-metallic atom which is required to be connected to each other to form a 5- or 6-membered ring; and X.sup.- represents BF.sub.4.sup.-, SbF.sub.6.sup.- or PF.sub.6.sup.-. A process for the preparation of the compound as described above is also described.
Claims4
A dianilinoglutacondialdehyde compound represented by the following formula (Ia) or (Ib):
- ##STR27## wherein R.sup.1 and R.sup.2 each represents an alkyl group or an aryl group and may be connected to each other;
- R.sup.3 represents a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom;
- R.sup.4 and R.sup.5 each represents a hydrogen atom or a non-metallic atom which is required to be connected to each other to form a 5- or 6-membered ring;
- and X.sup.- represents BF.sub.4.sup.-, SbF.sub.6.sup.- or PF.sub.6.sup.-.
A process for the preparation of a dianilinoglutacondialdehyde compound represented by the following formula (Ia) or (Ib), which comprises the reaction of an orthoester, an aniline compound and an iminium cation represented by the following formula (II) in the presence of an acid:
- ##STR28## wherein R.sup.1 and R.sup.2 each represents an alkyl group or an aryl group and may be connected to each other;
- R.sup.3 represents a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom;
- R.sup.4 and R.sup.5 each represents a hydrogen atom or a non-metallic atom which is required to be connected to each other to form a 5- or 6-membered ring;
- R.sup.6 and R.sup.7 each represents a methyl group or a non-metallic atom which is required to be connected to each other to form a 5- or 6-membered ring;
- and X.sup.- represents BF.sub.4.sup.-, SbF.sub.6.sup.- or PF.sub.6.sup.-.
A process for the preparation of a dianilinoglutacondialdehyde compound represented by the following formula (Ia) or (Ib), which comprises the reaction of an N,N-diphenylformaldehyde compound represented by the following formula (III) with an iminium cation represented by the following formula (II):
- ##STR29## wherein R.sup.1 and R.sup.2 each represents an alkyl group or an aryl group and may be connected to each other;
- R.sup.3 represents a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom;
- R.sup.4 and R.sup.5 each represents a hydrogen atom or a non-metallic atom which is required to be connected to each other to form a 5- or 6-membered ring;
- R.sup.6 and R.sup.7 each represents a methyl group or a non-metallic atom which is required to be connected to each other to form a 5- or 6-membered ring;
- and X.sup.- represents BF.sub.4.sup.-, SbF.sub.6.sup.- or PF.sub.6.sup.-.
Dependencies are inferred from the claim text.