The addition of phosphorus halides to ynamines. Ring-chain tautomerism of phosphirene with isomeric open structure
摘要:
The reaction of halogenodiisopropylphosphines 3a-c with 1-diethylamino- 1-butyne 4 in dichloromethane leads to new phosphirenes 5. In benzene or pentane mixtures of phosphirenes 5c and isomeric open structure 6 have been obtained. Ring-chain tautomerism for 5c and 6 have been observed for the first time.
New monomeric organoaluminium chelate compounds; N-diethylaluminium N-methyl dialkylthiophosphinic amide and dialkyldithiophosphinate; R2P(S)–X–AlEt2 (X=NMe, S), were prepared. Spectroscopic results of these compounds indicate an intramolecular coordination of sulfur atom of P=S bond to the organoaluminium moiety. Addition reactions of Me2P(S)–NMe–AlEt2 and Et2P(S)–S–AlEt2 with phenyl isocyanate gave
Oxidative Addition of a Phosphinite P–O Bond at Nickel
作者:Quinton J. Bruch、Noah D. McMillion、Chun-Hsing Chen、Alexander J. M. Miller
DOI:10.1021/acs.inorgchem.2c04188
日期:2023.2.6
Oxidativeaddition is an essential elementary reaction in organometallic chemistry and catalysis. While a diverse array of oxidativeadditionreactions has been reported to date, examples of P–O bond activation are surprisingly rare. Herein, we report the ligand-templated oxidativeaddition of a phosphinite P–O bond in the diphosphinito aniline compound HN(2-OPiPr2-3,5-tBu-C6H2)2 [H(P2ONO)] at Ni0
氧化加成是有机金属化学和催化中必不可少的基本反应。虽然迄今为止已经报道了各种各样的氧化加成反应,但 P-O 键活化的例子却非常罕见。在此,我们报道了二亚膦基苯胺化合物 HN(2-OP i Pr 2 -3,5- t Bu-C 6 H 2 ) 2 [H(P 2 ONO ) 中亚膦酸酯 P-O 键的配体模板氧化加成)] 在 Ni 0形成 (PONO)Ni(HP i Pr 2) 质子重排后。值得注意的是,P-O 裂解选择性地发生在胺 N-H 键激活上。此外,配体蚕食是可逆的,因为向 (PONO)Ni(HP i Pr 2 ) 添加 XPR 2 (X = Cl, Br; R = i Pr, Cy)很容易产生对称或不对称的 (P 2 ONO)NiX物种和自由 HP i Pr 2。最后,研究了初始 P-O 键断裂及其后续重建的机制,以进一步了解如何靶向 P-O 键激活。
Hinke, Axel; Kuchen, Wilhelm, Phosphorus and Sulfur and the Related Elements, 1983, vol. 15, p. 93 - 98
作者:Hinke, Axel、Kuchen, Wilhelm
DOI:——
日期:——
One-Pot Synthesis of 1,3-Bis(phosphinomethyl)arene PCP/PNP Pincer Ligands and Their Nickel Complexes
作者:Wei-Chun Shih、Oleg V. Ozerov
DOI:10.1021/acs.organomet.5b00671
日期:2015.9.28
A one-pot synthesis of arene-based PCP/PNP ligands has been developed. The reaction of 1,3-bis(bromomethyl)benzene or 2,6-bis(bromomethyl)pyridine with various chlorophosphines in acetonitrile afforded bis-phosphonium salts. These salts can then be reduced by magnesium powder to yield PCP or PNP ligands. In comparison to traditional synthetic methods for making PCP/PNP ligands involving the use of secondary phosphines, this new alternative method allows for the use of chlorophosphines, which are cheaper, safer to handle, and have a broader range of commercially available derivatives. This is especially true for the chlorophosphines with less bulky alkyl groups. Moreover, the one-pot procedure can be extended to allow for the direct synthesis of PCP/PNP nickel complexes. By using nickel powder as the reductant, the resulting nickel halide was found to directly undergo metalation with the PCP or PNP ligand to generate nickel complexes in high yields.
Lukashev, N. V.; Artyushin, O. I.; Lazhko, E. I., Journal of general chemistry of the USSR, 1990, vol. 60, # 7.1, p. 1374 - 1382
作者:Lukashev, N. V.、Artyushin, O. I.、Lazhko, E. I.、Luzikova, E. V.、Kazankova, M. A.