Abstract:
Disclosed is a selective process for the preparation of a tertiary triaryl amine A-N(B)(C) under the conditions of the Buchwald-Hartwig cross-coupling. Preferably, one of the aryl radicals is a biphenyl derivative. The claimed 2-stage process is characterized in that the two steps are catalyzed by a palladium complex selected from the group consisting of bis(dialkylphosphinoferrocene)palladium complexes or complexes of formula PdX1X2L1L2, wherein X1 and X2 are identical or different halogen ligands, L1 and L2 are identical or different electron donor ligands, or combinations thereof. Preferred are Pd catalysts of the formula PdX1X2L1L2, wherein palladium-NHC complexes (n-heterocyclic carbene complexes) are preferred. Exemplary for the claimed method is example 4a: In the first reaction step, the primary amine 2a is reacted to a secondary amine 3a: formulae 1a, 2a, 3a. In the second reaction step, 3a is then reacted with 4-bromo-1,1'-biphenyl to the tertiary amine 4b: formula (A).
Abstract:
In one embodiment, the application discloses ligands, such as a ligand from a dihydrobenzo [1,3] oxaphosphole scaffold, and palladium or other transition metal complexes comprising the ligands and methods for performing cross coupling reactions and asymmetric cross coupling reactions with high selectivity and efficiency, under aqueous micellar catalysis conditions.
Abstract:
Complexes and devices, such as organic light emitting devices and full color displays, including a compound of the formula wherein: M is Pd 2+ , Ir + , Rh + , or Au 3+ ; each of V 1 , V 2 , V 3 , and V 4 is coordinated to M and is independently N, C, P, B, or Si; each of L 1 , L 2 , L 3 , and L 4 is independently a substituted or unsubstituted aryl, cycloalkyl, cycloalkenyl, heterocyclyl, heteroaryl, carbene, or N-heterocyclic carbene; and Z is O, S, NR, CR 2 , SiR 2 , BR, PR, where each R is independently substituted or unsubstituted C1-C4 alkyl or substituted or unsubstituted aryl.
Abstract:
Use a solvent blend that contains 1-methoxy-2,7-octadiene and an alkanols rather than the alkanols by itself to prepare a catalyst precursor suitable for use in butadiene telomerization.
Abstract:
The disclosure provides nanostructures ( e.g. , nanospheres and nano-paddlewheels) formed through transition metal-ligand ( e.g. , Pd(II)-, Ni(II)-, or Fe(II)-ligand of Formula (A)) coordination and junction self-assembly. The disclosure also provides supramolecular complexes that include the nanostructures connected by divalent linkers Y. The provided supramolecular complexes are able to form gels (e.g., hydrogels). The gels are suprametallogels and exhibited excellent mechanical properties without sacrificing self-healing and showed high robustness and storage modulus. The present disclosure further provides compositions ( e.g. , gels) that include the nanostructures or supramolecular complexes and optionally an agent ( e.g. , small molecule), where the nanostructures and the nanostructure moieties of the supramolecular complexes may encapsulate and slowly release the agent. The nanostructures, supramolecular complex, and compositions may be useful in delivering an agent to a subject, tissue, or cell, as super-absorbent materials, and in treating a disease ( e.g ., a genetic diseases, proliferative disease ( e.g ., cancer or benign neoplasm), hematological disease, neurological disease, gastrointestinal disease ( e.g ., liver disease), spleen disease, respiratory disease ( e.g. , lung disease), painful condition, genitourinary disease, musculoskeletal condition, infectious disease, inflammatory disease, autoimmune disease, psychiatric disorder, or metabolic disorder).
Abstract:
The present invention relates to catalyst complexes comprising palladium (Pd) and at least one spiro-1,1 '-biindane-7,7'- bisphosphine oxide ligand as disclosed herein, and their use. The present invention is further directed to the asymmetric Pd-catalyzed covalent carbon-carbon single bond formation from aryl, heteroaryl and alkenyl triflates and halides and olefins utilising the said catalyst complexes.
Abstract:
The present invention relates to dinuclear metal-carbene complexes comprising a central atom selected from platinum and palladium, where both metal atoms are cyclometalated to the same aromatic group, to OLEDs (Organic Light-Emitting Diodes) which comprise such complexes, to a device selected from the group consisting of illuminating elements, stationary visual display units and mobile visual display units comprising such an OLED, to the use of such a metal-carbene complex in OLEDs, for example as emitter, matrix material, charge transport material and/or charge or exciton blocker.