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
Preparation and Reactivities of (η<sup>3</sup>-1- and 2-Trimethylsiloxyallyl)Fe(CO)<sub>2</sub>NO Complexes. Intermediates Functioning as Equivalents of β- and α-Acyl Carbocations and Acyl Carbanions
作者:Keiji Itoh、Saburo Nakanishi、Yoshio Otsuji
DOI:10.1246/bcsj.64.2965
日期:1991.10
(η3-1- and 2-Trimethylsiloxyallyl)Fe(CO)2NO complexes were prepared by the reaction of the corresponding siloxyallylic halides with Bu4N[Fe(CO)3NO]. These complexes reacted with both of carbon nucleophiles and carbon electrophiles preferentially at the less hindered sites of the allylic ligands. In these reactions, (η3-1-trimethylsiloxyallyl)Fe(CO)2NO complexes served as synthetically equivalent synthons
Enolate-cation association affects regioselectivity of nucleophile reactions with organoiron complexes
作者:Anthony J. Pearson、Trevor R. Perrior、David C. Rees
DOI:10.1016/s0022-328x(00)87440-9
日期:1982.2
considerable degree of regiochemical control may be achieved during addition of stable enolate nucleophiles to tricarbonyl(cyclohexadienyl)ironcomplexes of general structure I by changing the enolate countercation. The results indicate an interplay between steric, coulombic and frontier orbital controlling factors during the bond-forming reaction.
Studies on the synthesis and reactivity toward carbon nucleophiles of tricarbonyl(1-5-η-4-isopropoxy-1-isopropylcyclohexa-2,4-dienylium)iron hexafluorophosphate are reported. The preparations of tricarbonyl(3-(1-5-η-4-methoxycyclohexa-2,4-dienylium)butyl malononitrile)iron hexafluorophosphate and tricarbonyl[methyl-3-(1-5-η-4-methoxycyclohex-2,4-dienylium)butyl cyanoacetate]iron hexafluorophosphate
Treatment of 5-acylamino-4-thiazoline-2-thiones (6) with methyl iodide followed by treatment with an alkali gave the corresponding mesoionic 5-acylimino-2-methylthiothiazoles (8) instead of the corresponding thiazolium salts. The reactions of 2-methylthiothiazoles (8) with nucleophiles gave 2-substituted 5-acylamino-4-thiazolines.