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
Process for the preparation of certain substituted aromatic compounds
申请人:Norwich Eaton Pharmaceuticals, Inc.
公开号:EP0321432A1
公开(公告)日:1989-06-21
The present invention involves process for the preparation of compounds having the chemical structure:
wherein Ar-H is an aromatic compound which is activated to an electrophilic attack, and wherein -Y is an aliphatic group having a labile moiety, especially where the labile moiety is a terminally unsaturated moiety: -C≡CH, - c =CH2,
or aldehydes in the form of their acetals. The process comprises the step of reactinct Ar-H and
wherein -X is -Cl or -Br, and where the reaction step is carried out in a solvent medium at a temperature of from about -40°C to about -100°C using stannic chloride as a catalyst.