20336-01-0Relevant academic research and scientific papers
Visible-light-induced ligand to metal charge transfer excitation enabled phosphorylation of aryl halides
Hou, Hong,Zhou, Bing,Wang, Jiawei,Sun, Duhao,Yu, Huaguang,Chen, Xiaoyun,Han, Ying,Shi, Yaocheng,Yan, Chaoguo,Zhu, Shaoqun
supporting information, p. 5702 - 5705 (2021/06/16)
We herein described a visible light induced nickel(II)-catalyzed cross-coupling of secondary phosphine oxides with aryl halides. The Ni(I)species and chlorine atom radical Cl˙ were generatedviathe ligand to metal charge transfer (LMCT) process of the NiCl2(PPh3)2, which allows nickel(IV)-phosphorus speciesin situformation, giving various tertiary phosphine oxides under photocatalyst-free conditions.
AlCl3-catalyzed C-H p hosphination of benzene: A mechanistic study
Duan, Haodong,Gao, Jun,Guo, Ge,Han, Yuxi,Leng, Kangwei,Li, Xinjin,Wang, Zhongwei,Xu, Xiaolei,Yu, Qing
, (2021/01/06)
The characteristics of the reaction for the preparation of dichlorophenylphosphine (DCPP) via benzene and PCl3 in the presence of AlCl3 were studied. Some unique characteristics were observed when a catalytic amount of AlCl3 was used. Namely, more than one mole of DCPP was obtained per mole AlCl3, the reaction solution was layered, and DCPP could be directly separated. Our mechanistic study showed that benzene reacted with PCl3 to form DCPP-AlCl3, and DCPP-AlCl3 dissociated into DCPP and AlCl3, continuing to catalyze this reaction. This resulted in the high catalytic efficiency of AlCl3. The layering of the reaction solution was caused by the immiscibility of DCPP-AlCl3 with the raw materials, greatly facilitating the dissociation process of DCPP-AlCl3. The formation of diphenylphosphorus chloride (DPC) was due to a continuous Friedel-Crafts reaction between DCPP and benzene. DPC cooperated with AlCl3 to form the stable coordination compound DPC-AlCl3 that did not dissociate and was responsible for the deactivation of AlCl3.
Diaryl phosphine oxide compound containing substituent groups and preparation method thereof
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Paragraph 0063-0066, (2020/03/17)
The invention discloses a diaryl phosphine oxide compound containing substituent groups and a preparation method of the diaryl phosphine oxide compound, the structural formula of the diaryl phosphineoxide compound is shown as (I), wherein R1 to R10 are independently selected from H, alkyl, halogen or halogen-substituted alkyl, and the halogen comprises F, Cl, Br and I. The preparation method comprises the following steps: adding aryl phosphine dichloride or a derivative thereof, aromatic hydrocarbon or a derivative thereof and a catalyst into a reaction flask, reacting for a certain period oftime under mild conditions, and dropwise adding into an ice-water mixture to hydrolyze after the reaction is completed, thereby obtaining the diaryl phosphine oxide compound. The preparation processhas the advantages of simple operation, mild reaction conditions, green and environment-friendly preparation process and the like. The diaryl phosphine oxide compound prepared by the method not only can be directly used for flame-retardant modification of epoxy resin, but also is an important raw material for synthesizing a novel acyl phosphine photoinitiator and a phosphorus-containing flame retardant.
