Ring Closure of Alkoxycarbonyl(tetracarbonyl)pyruvoyliron Complexes into Metallalactones Induced by Nucleophilic Attack of Carbanions
作者:Patrice Cabon、René Rumin、Jean‐Yves Salaün、Hervé des Abbayes、Smail Triki
DOI:10.1002/ejic.200500997
日期:2006.4
carbanions with the pyruvoyl-substituted iron complex [(CO)4Fe(CO2CH3)C(O)C(O)CH3}] (1) affords the anionic trifunctionalized metallalactones [(CO)3FeC(O)C(CH3)(CRR′R″)OC4(O)(Fe–C4)}(CO2CH3)]– (3), whose formation results from the addition of the nucleophile to the β carbonyl of the pyruvoyl moiety, followed by attack of the oxygen of this β carbonyl on a terminal carbonyl ligand. These anionic lactones react
N-Fluoropyridinium salts provide a new system of fluorinatingagents by which a wide range of nucleophilic substrates differing in reactivity can be fluorinated due to the varying degree of fluorinating power and also fluorinated very selectively through structural alteration. The scope of selective fluorination should be broadened considerably on the basis of the present results. The N-fluoropyridinium
N-fluoropyridinium triflate and its derivatives: Useful fluorinating agents
作者:Teruo Umemoto、Kosuke Kawada、Kyoichi Tomita
DOI:10.1016/s0040-4039(00)84980-1
日期:1986.1
N-Fluoropyridinium triflate and its derivatives, stable and nonhygroscopic crystals, were found to be widely applicable reagents for mild and selective fluorination of a variety of organic compounds.
Schiff bases containing ferrocenyl and thienyl units and their utility in the palladium catalyzed allylic alkylation of cinnamyl acetate
作者:David Pou、Ana E. Platero-Prats、Sonia Pérez、Concepción López、Xavier Solans、Mercè Font-Bardía、Piet W.N.M. van Leeuwen、Gino P.F. van Strijdonck、Zoraida Freixa
DOI:10.1016/j.jorganchem.2007.07.027
日期:2007.10
The synthesis and characterization of two new ferrocenyl Schiff bases: [Fc-CHN–(CH2)n–(C4H3S)] (2) Fc represents (η5-C5H5)Fe(η5-C5H4)– and n = 1(2a) or 2(2b)} containing the thienyl (C4H3S) group are reported. NMR studies indicate that 2 have the anti-(E) conformation in solution and the X-ray crystal structure of 2a confirms that it also adopts the anti-(E) form in the solid state. Ligands 2 have
的合成和两个新的二茂铁席夫碱表征:[Fc的CHN-(CH 2)ñ - (C 4 H ^ 3 S)(2)的Fc表示(η 5 -C 5 H ^ 5)的Fe(η 5 -据报道含有噻吩基(C 4 H 3 S)基团的C 5 H 4)-和n = 1(2a)或2(2b)} 。NMR研究表明2在溶液中具有抗-(E)构象,并且2a的X射线晶体结构确认它也采用固态的抗-(E)形式。使用2-甲基丙二酸二乙酯钠作为亲核试剂,在钯催化的乙酸(E)-3-苯基-2-丙烯-1-基(肉桂基)的烯丙基烷基化反应中对配体2进行了测试。的反应2与[加入Pd(η 3 -1-PH-C 3 H ^ 4)(μ-Cl)的] 2稍微过量K的存在[PF 6 ]制备[将Pd(η 3 -1-PH- C 3 H 4)Fc-CHN–(CH 2)n-(C 4 H 3S)}] [PF 6 ] n = 1(5a)或2(5b)},它们是该催化过程
作者:Ana E. Platero-Prats、Sonia Pérez、Concepción López、Xavier Solans、Mercè Font-Bardía、Piet W.N.M. van Leeuwen、Gino P.F. van Strijdonck、Zoraida Freixa
DOI:10.1016/j.jorganchem.2007.06.016
日期:2007.9
(1a) with palladium(II)–allyl complexes [Pd(η3-1R1,3R2-C3H3)(μ-Cl)]2 R1 = H and R2 = H (2), Ph (3) or R1 = R2 = Ph (4)} is reported. Treatment of 1a with 2 or 3 in a molar ratio Pd(II):1a = 1} in CH2Cl2 at 298 K produced [Pd(η3-3R2-C3H4)FcCHN–CH(Me)(Ph)}Cl] R2 = H (5a) or Ph (6a)}. When the reaction was carried out under identical experimental conditions usingcomplex 4 as starting material no evidence
对映体纯ferrocenylimine(的反应性的研究小号Ç) - [FcCHN-CH(Me)中(PH)] FC =(η 5 -C 5 H ^ 5)的Fe (η 5 -C 5 H ^ 4) - }(图1A)与钯(II) -烯丙基配合物[将Pd(η 3 -1R 1,3R 2 -C 3 H ^ 3)(μ-Cl)的] 2 R 1 = H和R 2 = H(2)中,Ph(3)或R 1 = R 2 = Ph(4)}。治疗1a用2或3 的摩尔比Pd(II):1A = 1}在CH 2氯2在298K产生的[将Pd(η 3 -3R 2 -C 3 H ^ 4)FcCHN-CH(Me)中(PH )} Cl] R 2 = H(5a)或Ph(6a)}。当反应使用复杂的相同的实验条件下进行4作为起始原料,没有证据为[钯形成(η 3 -1,3-PH 2 -C 3 H ^ 3)FcCHN-CH(Me)中(PH)