Showing papers on "Dichlorophenylphosphine published in 2017"
TL;DR: The reactivity of L2PhB as well as its transition-metal complexes toward main-group substrates have been systematically examined, which led to the construction of B-E bonds, and electrophilic alkylation of a neutral tricoordinate organoboron was achieved.
Abstract: The reactivity of L2PhB: (1; L = oxazol-2-ylidene) as well as its transition-metal (chromium and iron) complexes toward main-group substrates have been systematically examined, which led to the construction of B–E (E = C, Ga, Cl, H, F, N) bonds. The combination of 1 and triethylborane smoothly captured carbon dioxide concomitant with the formation of B–C and B–O bonds. The soft basic boron center in 1 readily reacted with soft acidic gallium trichloride (GaCl3) to afford the extremely stable adduct 4 involving a B–Ga dative bond. Electrophilic alkylation of a neutral tricoordinate organoboron was first achieved by the treatment of 1 with dichloromethane and methyl trifluoromethanesulfonate (MeOTf), both of which afforded ionic species featuring an additional B–C bond. Comparatively, redox reactions took place when halides of heavier elements such as germanium dichloride, dichlorophenylphosphine, and chlorodiphenylbismuth were employed as substrates, from which cationic species 7 bearing a B–Cl bond was ob...
26 citations
TL;DR: The benzophosphole-fused indoles, such as phosphine oxide, phospholium salt, and borane complex, exhibited strong photoluminescence in dichloromethane (Φ = 67–75%).
Abstract: The parent benzophospholo[3,2-b]indole was prepared by the reaction of dichlorophenylphosphine with a dilithium intermediate, which was prepared in two steps from 2-ethynyl-N,N-dimethylaniline. Using the obtained benzophosphole-fused indole as a common starting material, simple modifications were carried out at the phosphorus center of the phosphole, synthesizing various functionalized analogs. The X-ray structure analysis of trivalent phosphole and phosphine oxide showed that the fused tetracyclic moieties are planar. The benzophosphole-fused indoles, such as phosphine oxide, phospholium salt, and borane complex, exhibited strong photoluminescence in dichloromethane (Φ = 67–75%).
10 citations
Patent•
13 Jun 2017
TL;DR: In this paper, a synthesis method for a benzo[b]phospholes compound using trace air catalysis has been proposed, where an oxidant, a catalyst and an additive do not need to be additionally added, and tolerance on different functional groups is good.
Abstract: The invention belongs to the organic chemical synthesis field and in particular relates to a synthesis method of benzo[b]phospholes. The synthesis method comprises the following steps: taking 1-substitued-2-bromoaryl-acetylene as a raw material, adding a dichlorophenylphosphine synthesis intermediate, and then generating a target compound through trace air catalysis. The synthesis method provided by the invention has the advantages that an oxidant, a catalyst and an additive do not need to be additionally added, and tolerance on different functional groups is good, so that the synthesis method is an environment-friendly synthesis method for a benzo[b]phospholes compound; the yield reaches more than 40%, so that the synthesis method has a good application prospect.
4 citations
Patent•
16 Jun 2017
TL;DR: In this paper, a method for preparing the curing agent comprises the following steps; stirring and reacting dichlorophenylphosphine oxide (DCPPO) under the introduction of an inert gas for a certain period of time, and carrying out filtering, washing and drying treatment on the above obtained product to obtain a white solid.
Abstract: The invention relates to a curing agent and a preparation method thereof, and concretely relates to a dichlorophenylphosphine oxide and m-xylylenediamine epoxy resin curing agent and a preparation method thereof. Raw materials for preparing the dichlorophenylphosphine oxide and m-xylylenediamine epoxy resin curing agent comprise dichlorophenylphosphine oxide and m-xylylenediamine. The method for preparing the curing agent comprises the following steps; stirring and reacting dichlorophenylphosphine oxide (DCPPO) and m-xylylenediamine (MXDA) under the introduction of an inert gas for a certain period of time, and carrying out filtering, washing and drying treatment on the above obtained product to obtain a white solid. The above compound has good compatibility with epoxy resin, can be cured together with the epoxy resin, has small influences on the mechanical performances of a cured product, can be used as an epoxy resin curing agent, and also effectively improves the flame retardation performance of the epoxy resin. The method has the advantages of simple production conditions, high purity and high yield of the target product, and simple post-treatment process.
2 citations
Patent•
05 Sep 2017
TL;DR: In this paper, a selenium atom-containing fluorescence probe has been presented, which has the advantages of simple synthesis steps, mild conditions, low production cost and high thermal stability.
Abstract: The invention discloses a selenium atom-containing fluorescence probe, and a preparation method and an application thereof, and belongs to the field of functional materials. The structural general formula of above material is represented by formula (I) shown in the description; and in the formula (I), Ar is a carbazolyl or diphenylamino group, and Ph is a phenyl group. The preparation method of the material concretely comprises the following steps: reacting carbazole/diphenylamine with dichlorophenylphosphine/diphenylchlorophosphine to form a derivative containing an N-P structure, and carrying out chemical modification to introduce selenium atoms in order to form the selenium atom-containing fluorescence probe. The method has the advantages of simple synthesis steps, mild conditions, low production cost and high thermal stability. Se=O double bonds are formed through the reaction of the selenium atoms and hypochlorite radicals in order to generate fluorescence change. The selenium atom-containing fluorescence probe has the advantages of high sensitivity and high selectivity.
1 citations
Patent•
15 Dec 2017
TL;DR: In this article, a reactive phosphorus-containing epoxy resin flame-retardant curing agent and a preparation method are described. But the preparation method of the flame retardant comprises the following steps: reacting the dichlorophenylphosphine oxide (DCPPO) and the m-xylylenediamine (MXDA) with stirring for some time while inert gas is introduced, and performing filtration, washing, drying and other treatment on the product to obtain a white solid.
Abstract: The invention provides a reactive phosphorus-containing epoxy resin flame-retardant curing agent and a preparation method thereof, and relates to a curing agent and a preparation method thereof. Raw materials for preparation comprise dichlorophenylphosphine oxide and m-xylylenediamine. The preparation method of the flame retardant comprises the following steps: reacting the dichlorophenylphosphine oxide (DCPPO) and the m-xylylenediamine (MXDA) with stirring for some time while inert gas is introduced; and performing filtration, washing, drying and other treatment on the product to obtain a white solid. The compound has favorable compatibility with epoxy resin, can be cured with the epoxy resin into a whole and has less influence on the mechanical properties of a cured product; and the compound can serve as the epoxy resin curing agent, and can effectively improve the flame retardancy of the epoxy resin. The process provided by the invention is simple in production conditions, high in product purity and yield and convenient in a posttreatment process.