349100-75-0

Usage

Uses

Used in Plastics Industry:
P,P′-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis[N,N,N′,N′-tetraethyl-phosphonous diamide] 97% is used as a photoinitiator for the production of polycarbonate and other plastics. Its strong UV absorption and ability to initiate photochemical reactions make it an efficient catalyst in the polymerization process, contributing to the formation of high-quality plastic materials.
Used in Adhesives Manufacturing:
In the adhesives industry, P,P′-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis[N,N,N′,N′-tetraethyl-phosphonous diamide] 97% is utilized as a photoinitiator to enhance the curing process of adhesive formulations. Its high efficiency in initiating polymerization reactions ensures the production of strong and durable adhesives with improved bonding properties.
Used in Coatings Production:
P,P′-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis[N,N,N′,N′-tetraethyl-phosphonous diamide] 97% is employed as a photoinitiator in the coatings industry to facilitate the curing of coating materials. Its ability to initiate photochemical reactions under UV light enables the production of coatings with enhanced durability, adhesion, and resistance to environmental factors.
Used in Polymer-based Products Manufacturing:
P,P′-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis[N,N,N′,N′-tetraethyl-phosphonous diamide] 97% is used as a photoinitiator in the manufacturing of various polymer-based products. Its high purity and efficiency in initiating polymerization reactions contribute to the production of high-quality polymer materials with improved performance characteristics.

Upstream product

• 19814-75-6 9,9-dimethylxanthene 
• 685-83-6 bis(diethylamino)chlorophosphine 

Downstream Products

• 404873-89-8 4,5-bis-{dibenzo[d,f]-2,4,3',5'-tetra-tert-butyl[1,3,2]dioxaphosphepino}-9,9-dimethyl-9H-xanthene 

Relevant academic research and scientific papers

Xantphos Doped POPs-PPh3 as Heterogeneous Ligand for Cobalt-Catalyzed Highly Regio- and Stereoselective Hydrosilylation of Alkynes

A Co(acac)2/POL-Xantphos@10PPh3-catalyzed hydrosilylation of unsymmetrical internal alkynes with Ph2SiH2 has been developed for the synthesis of highly selective syn-α-vinylsilane products. Furthermore, terminal alkynes were also used and gave the products with excellent regioselectivity and a wide functional group tolerance. Because this porous organic polymer combines the selectivity and activity merits of Xantphos with the stability advantage derived from the high concentration of PPh3, the Co(acac)2/POL-Xantphos@10PPh3 can be recycled multiple times without loss of activity and selectivity. This heterogeneous catalyst is expected to find promising applications in industrial synthesis.

Porous organic polymer-derived nanopalladium catalysts for chemoselective synthesis of antitumor benzofuro[2,3-b]pyrazine from 2-Bromophenol and Isonitriles

An efficient strategy for the synthesis of benzofuro[2,3-b]pyrazines was developed. These tricyclic scaffolds were formed through a multistep cascade sequence, which includes double insertion of isonitriles and chemoselective bicyclization. In this reaction, a nanopalladium was used as a recyclable catalyst. Product 3w exhibited excellent anticancer activity toward T-24 (IC50 = 12.5 ± 0.9 μM) and HeLa (IC50 = 14.7 ± 1.6 μM) cells. We also explored the action mechanism of 3w on T-24 cells.

Method for high selectively preparing aldehyde by using olefin

The invention discloses a method for high selectively preparing an aldehyde by using an olefin. According to the method, an organic polymer self-load type catalyst is used, an olefin hydroformylationreaction is applied to high selectively preparation of an aldehyde. According to the organic polymer self-load catalyst, one, two or three metals selected from a group consisting of Rh, Co, Pd and Irare used as active components, and a phosphine-containing organic copolymer is used as a carrier, wherein the phosphine-containing organic copolymer carrier is formed by copolymerization of a polydentate organic phosphine ligand and a monodentateorganic phosphine ligand. The organic polymer self-load catalyst provided by the invention is suitable for reactors such as fixed beds, slurry beds, bubbling beds, trickle beds and the like, and has good performance in a reaction of high selectively preparing the aldehyde through the olefin hydroformylation reaction; the aldehyde with a high normal-specific ratio can be produced, wherein the positive-specific ratio can reach 25 or above; side reactions are few; and the alkane content of an obtained product is 1% or below. The multi-phase catalyst is good in stability, and the separation of the catalyst from the reactants and products is simple and efficient.

Method for catalyzing decarbonylation reaction of furfural derivative by bidentate phosphine ligand polymer supported palladium catalyst

The invention discloses a method for catalyzing the decarbonylation reaction of a furfural derivative by a bidentate phosphine ligand polymer supported palladium catalyst. A vinyl functionalized bidentate phosphine ligand is polymerized, the obtained polymer supported palladium catalyst is used as a heterogenous catalyst to catalyze the reaction, the heterogenous catalysis system has the advantages of extensive applicability to a reaction substrate, significant reduction of the use amount of the palladium catalyst, short reaction time, few additives, good selectivity, high yield, simplicity, and easiness in operation, the catalyst can be repeatedly used without reducing the activity in order to significantly reduce the use amount of the expensive palladium catalyst in the reaction and successfully overcome the restriction of a homogeneous reaction, and the catalyst used in the invention has the advantages of high thermal stability, good resistance to a strong acid and a strong alkali,small dosage, high activity, high conversion rate, simplicity in operation, and no gas protection, and is suitable for industrial production. The method has the advantages of simplicity in experimentoperation, easily available raw materials, high output, high reaction rate, excellent industrialization prospect and excellent sustainable development strategy meaning.

Palladium-metalated porous organic polymers as recyclable catalysts for chemoselective decarbonylation of aldehydes

A novel palladium nanoparticle (NP)-metalated porous organic ligand (Pd NPs/POL-xantphos) has been prepared for the chemoselective decarbonylation of aldehydes. This heterogenous catalyst not only has excellent catalytic activity and chemoselectivity, but also holds high activity after 10 runs of reuse. The effective usage of this method is demonstrated through the synthesis of biofuels such as furfuryl alcohol (FFA) via the highly chemoselective decarbonylation of biomass-derived 5-hydroxy-methylfurfural (HMF) with a TON up to 1540. More importantly, 9-fluorenone could be obtained in one step through the decarbonylation of 2-bromobenzaldehyde by using this heterogeneous catalyst.

Porous Organic Polymer as a Heterogeneous Ligand for Highly Regio- and Stereoselective Nickel-Catalyzed Hydrosilylation of Alkyne

A porous organic polymer (POL-Xantphos) was synthesized and employed as a heterogeneous ligand for selective hydrosilylation of alkynes. It exhibits high selectivity and catalytic efficiency toward a broad range of alkynes. Owing to the confinement effect of the micropore structure, POL-Xantphos was far superior to the monomeric Xantphos ligands in controlling the selectivity. By performing hydrosilylation in a flow reactor system, separation and regeneration of the Ni/POL-Xantphos catalyst are easily achieved without any loss in selectivity or activity.

Electronic and bite angle effects in catalytic C-O bond cleavage of a lignin model compound using ruthenium Xantphos complexes

Bite angle and electronic effects on the ruthenium-diphosphine catalysed ether bond cleavage of the lignin β-O-4 model compound 2-phenoxy-1-phenylethanol were tested. Enhanced conversion of the substrate was observed with increasing σ-donor capacity of the ligands. Kinetic and thermodynamic data suggest oxidative addition of the dehydrogenated model compound to the diphosphine Ru(0) complex to be rate-limiting.

Sterically demanding diphosphonite ligands - Synthesis and application in nickel-catalyzed isomerization of 2-methyl-3-butenenitrile

The synthesis of a novel class of sterically demanding diphosphonites 1-8, based on rigid backbones, is described. The starting materials are all commercially available and the methodology allows for a modular approach. All ligands have been fully characterized, including an X-ray crystal structure for compound 1, 4,5-bis{di[(2-terr-butyl)phenyl]phosphonito}-9,9-dimethylxanthene. The coordination of these diphosphonite ligands towards Ni(II) and Ni(0) precursors is investigated, both by NMR spectroscopy as well as X-ray crystallography and compared with the behaviour of diphosphine ligands such as Xantphos. The molecular structure for complex 9, trans-[NiBr2(1)] is described in detail. The nickel-catalyzed isomerization of 2-methyl-3- butenenitrile to 3-pentenenitrile is studied, a relevant step in the industrially important hydrocyanation of butadiene (the DuPont adiponitrile process). Good activities and selectivities to the desired 3-pentenenitrile are obtained in this reversible C-C bond activation reaction.

Coordination chemistry and asymmetric catalysis with a chiral diphosphonite

The improved synthesis of the chiral diphosphonite, XantBino (1), based on a xanthene backbone and bearing chiral binaphthyl groups on both P-atoms is described together with its PdII and Rh1 complexes. The 31P NMR spectra of both complexes point out that the two phosphorus atoms are chemically inequivalent. The complex cis-[PdCl2(1)] (2) is structurally characterized by NMR spectroscopy and X-ray crystallography. The molecular structure reveals an unusually small bite angle for this member of the xantphos family of only 100°. The rhodium-catalyzed asymmetric hydroformylation of styrene and vinyl acetate as well as the asymmetric hydrogenation of methyl (Z)-2-acetamidocinnamate, applying this chiral diphosphonite 1, are described. Low enantiomeric excesses are obtained in the asymmetric hydroformylation, while use of the catalyst precursor [Rh(cod)(1)]BF4 (3) results in a promising enantiomeric excess in the Rh-catalyzed asymmetric hydrogenation. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.

Asymmetric nickel-catalyzed hydrocyanation of vinylarenes by applying homochiral xantphos ligands

New homochiral xantphos-type diphosphonite ligands with 3 substituents have been prepared and characterized by NMR spectroscopy. These ligands have been applied in the nickel-catalyzed hydrocyanation of styrene and other vinylarenes. Enantioselectivities up to 63 % ee have been obtained by using 4-isobutylstyrene as a substrate. Addition of an excess of ligand strongly inhibits the hydrocyanation reaction since the bis-chelate nickel complexes formed are highly stable and catalytically inactive.