环丙基[ b ]萘(3a)的三羰基铬配合物在Bu(C)在C(1)处去质子化。将所得阴离子用Mel淬灭,得到立体异构甲基衍生物6a和6b的1:1混合物。双甲硅烷基化的配合物3b的彼得森烯化以低收率提供了配合物的亚烷基环戊烯5。环丙烷[ b ]蒽(10)的三羰基铬配合物可通过9的双氢脱甲硅烷基化获得。还报道了它的X射线结构。尝试合成苯并环丙烯的三羰基铬配合物(11a)失败。
Palladium-Catalyzed Allylic Substitution with (η<sup>6</sup>-Arene–CH<sub>2</sub>Z)Cr(CO)<sub>3</sub>-Based Nucleophiles
作者:Jiadi Zhang、Corneliu Stanciu、Beibei Wang、Mahmud M. Hussain、Chao-Shan Da、Patrick J. Carroll、Spencer D. Dreher、Patrick J. Walsh
DOI:10.1021/ja208935u
日期:2011.12.21
Although the palladium-catalyzed Tsuji-Trost allylic substitution reaction has been intensively studied, there is a lack of general methods to employ simple benzylic nucleophiles. Such a method would facilitate access to "α-2-propenyl benzyl" motifs, which are common structural motifs in bioactive compounds and natural products. We report herein the palladium-catalyzedallylationreaction of toluene-derived
Addition de carbanions α benchrotreniques sur divers aldehydes non enolisables; evolution des produits primaires d'addition par oxydation d'oppenauer-woodward, influence de la substitution
作者:M.-C. Senechal-Tocquer、D. Senechal、J.-Y. Le Bihan、D. Gentric、B. Caro
DOI:10.1016/0022-328x(87)80307-8
日期:1987.4
Aromatic hydrocarbons complexed with a Cr(CO)3 unit react with benzaldehydes and furfural in THF and in the presence of t-BuOK at the benzylic position to give condensation products in good yields. Formation of ketones by “in situ Oppenauer-Woodward” oxidation is observed. Influence of ring substituents on this formation is discussed.
Chlorotrimethylsilane-mediated Michael addition reactions of chiral benzylic anions derived from η6-chromiumtricarbonyl complexes
作者:Rohan E.J Beckwith、Nicola Heron、Nigel S Simpkins
DOI:10.1016/s0022-328x(02)01590-5
日期:2002.9
Michael adducts are greatly improved in the presence of Me3SiCl. Some further transformations of the Michael adducts were carried out, including a ring expansion process of a cyclohexanone derivative and a SmI2 mediated cyclisation of a complex bearing an acyclic ketone appendage.
Synthesis of oximes from (arene)Cr(CO)<sub>3</sub>complexes by nitrosation at the benzylic position
作者:Denis Sénéchal、Marie-Claude Sénéchal-Tocquer、Daniel Gentric、Jean-Yves Le Bihan、Bertrand Caro、Michel Gruselle、Gérard Jaouen
DOI:10.1039/c39870000632
日期:——
In basic media, aromatic hydrocarbons complexed by Cr(CO)3 units are readily nitrosated at the benzylicposition by ButONO, giving rise to (Z)- and (E)-oximes in moderate to excellent yields.
Addition of Stabilized Carbanions to Cationic (η6-Arene)tricarbonylmanganese Complexes: Syntheses of Homo (Mn–Mn) and Hetero (Mn–Cr) Dinuclear Complexes
作者:Eric Rose、Claudine Le Corre-Susanne、Françoise Rose-Munch、Christophe Renard、Vanessa Gagliardini、Fatima Teldji、Jacqueline Vaissermann