1733-57-9Relevant articles and documents
ANTIINFLAMMATORY AND ANALGESIC ACTIVITY OF TERTIARY PHOSPHINE OXIDES
Beznosko, B. K.,Usanova, V. M.,Zhuravleva, L. V.,Kharitonov, A. V.,Bondarenko, N. A.,et al.
, p. 244 - 247 (1990)
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Correlation of the rates of solvolysis of chlorodiphenylphosphine using the extended grunwald-winstein equation
Koh, Han Joong,Kevill, Dennis N.
, p. 865 - 874 (2010)
Specific rates of solvolysis involving displacement of chloride from the trivalent phosphorus of chlorodiphenylphosphine (Ph2PCl, 1) are reported for ethanol, methanol, and aqueous binary mixtures incorporating ethanol, methanol, acetone, 2,2,2-trifluoroethanol (TFE), and 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP). The 25 solvents give an extended Grunwald-Winstein correlation with an l value of 1.25 0.09, m value of 0.46 0.06, and correlation coefficient (R) of 0.954. The reactions in aqueous acetone were unusually fast, and these data points lie above the plot. Specific rate values are also reported for TFE-ethanol mixtures. For five representative solvents, values were obtained at three additional temperatures and activation parameters are presented. Rather low enthalpies of activation (8.4 to 11.8 kcal mol-1) are accompanied by very negative entropies of activation (-33 to -46 cal mol-1K-1). The kinetic features observed are consistent with an SN2 reaction incorporating appreciable bond formation and bond breaking at the transition state, and they are very similar to those previously observed for diphenylphosphinyl chloride (Ph2POCl).
Heimgartner et al.
, p. 1385,1387,1399 (1972)
Bipyridine structure ligand and preparation method thereof, bipyridine structure-based catalytic system and application of bipyridine structure-based catalytic system in ethylene oligomerization
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Paragraph 0103; 0106, (2020/07/15)
The invention provides a bipyridine structure ligand represented by a formula I and a preparation method thereof, and the invention also provides a catalytic system based on the bipyridine structure and an application of the catalytic system in ethylene oligomerization, wherein the catalytic system comprises the bipyridine structure ligand, a metal precursor taking chromium as a center and a cocatalyst. The catalytic system can improve the selectivity of 1-octene and greatly reduce oligomers in ethylene oligomerization reaction, the selectivity of the 1-octene is 79.2%, the content of the oligomer is 0.8%, and possibility is provided for ethylene oligomerization industrialization.
Synthesis method of trisubstituted phosphine oxide compound
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Paragraph 0030, (2019/05/08)
The invention provides a synthesis method of a trisubstituted phosphine oxide compound. In the method, monohydric alcohol or dihydric alcohol which is inexpensive, readily available, stable and low intoxicity are used as alkylating agents, and cheap and readily available halosilane is used as a catalyst, thus directly obtaining the trisubstituted phosphine oxide compound through high-selectivityreaction. The reaction method is simple, the conditions are mild, no solvent is needed, the operation is easy, and water is a reaction by-product. The method has low requirements on the reaction conditions, and benzyl type, allyl type and aliphatic type alcohol can be used as the alkylating agent to realize the synthesis of the target phosphine oxide compound, and has a relatively wide applicationrange. The method can also conveniently scale up the production by 20 times and carry out the gram-level preparation of products, so the method should also have certain research and industrial application prospects.
