| US 7,482,450 B2 | ||
| Method for producing high-purity organoiridium compounds | ||
| Ingrid Bach, Bad Soden (Germany); Philipp Stössel, Frankfurt (Germany); and Hubert Spreitzer, Viernheim (Germany) | ||
| Assigned to Merck Patent GmbH, (Germany) | ||
| Appl. No. 10/550,976 PCT Filed Mar. 24, 2004, PCT No. PCT/EP2004/003087 § 371(c)(1), (2), (4) Date Sep. 26, 2005, PCT Pub. No. WO2004/085449, PCT Pub. Date Oct. 07, 2004. |
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| Claims priority of application No. 103 14 102 (DE), filed on Mar. 27, 2003. | ||
| Prior Publication US 2006/0142604 A1, Jun. 29, 2006 | ||
| Int. Cl. C07F 15/00 (2006.01) | ||
| U.S. Cl. 546—2 [556/146] | 18 Claims |
1. A process for preparing homoleptic Ir(III) complexes of the formula (I)
 CyD is a cyclic group which contains at least one donor atom via which the cyclic group is bonded to the metal and which may
in turn bear one or more substituents R; the CyD and CyC groups are joined together via a covalent bond;
CyC is a cyclic group which contains a carbon atom via which the cyclic group is bonded to the metal and which may in turn
bear one or more substituents R;
R is the same or different at each instance and is H, F, Cl, Br, I, NO2, CN, a straight-chain or branched or cyclic alkyl or alkoxy group having from 1 to 20 carbon atoms, in which one or more
nonadjacent CH2 groups may be replaced by —O—, —S—, —NR1—, —CONR2—, —CO—O—, —CR1═CR1— or —C≡C—, and in which one or more hydrogen atoms may be replaced by F, or an aryl or heteroaryl group which has from 4
to 14 carbon atoms and may be substituted by one or more nonaromatic R radicals; where a plurality of substituents R, both
on the same ring and on the two different rings, together may in turn form a further mono- or polycyclic, aliphatic or aromatic
ring system;
R1 and R2 are the same or different at each instance and are H or an aliphatic or aromatic hydrocarbon radical having from 1 to 20 carbon
atoms,
characterized by the reaction of an iridium(III)-containing reactant which contains at least one diketonate structural unit
of the formula (II)
 R4, R6 are the same or different at each instance and are a linear, branched or cyclic alkyl group having 1-20 carbon atoms, in which
one or more nonadjacent CH2 groups may be replaced by —O—, —S—, —NR1—, —CONR2—, —CO—O—, —CR1═CR1— or —C≡C—, and in which one or more hydrogen atoms may be replaced by F or aromatic groups each having from 3 to 14 carbon
atoms, or an aryl and/or heteroaryl group having 3-20 carbon atoms or an alkoxy group OR1,
R5 is the same or different at each instance and is a linear, branched or cyclic alkyl group having 1-20 carbon atoms, in which
one or more nonadjacent CH2 groups may be replaced by —O—, —S—, —NR1—, —CONR2—, —CO—O—, —CR1═CR1— or —C≡C—, and in which one or more hydrogen atoms may be replaced by F or aromatic groups each having from 3 to 14 carbon
atoms, or an aryl and/or heteroaryl group having 3-20 carbon atoms,
R1 and R2 are the same or different at each instance and are H or an aliphatic or aromatic hydrocarbon radical having from 1 to 20 carbon
atoms,
excluding homoleptic diketonate complexes of the formula (II) and compounds of the formula (II) which contain two ligands
of the formula (III)
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