已经开发出一种独特的铜催化的2-氨基吡啶双亲核开关,用于在有氧反应条件下,在分子碘存在下,使用烯烃/炔烃作为偶联伙伴,选择性地合成2-和3-碘咪唑并[1,2- a ]吡啶。 。该方法也适用于2-碘-3-苯基苯并[ d ]咪唑并[ 2,1- b ]噻唑的合成。该方案为合成2,3-二芳基咪唑并[1,2- a ]吡啶提供了一条简便的途径。
1-Trimethylsiloxyallylic Iron Complexes as a β-Acylcarbanion Equivalent
作者:Keiji Ito、Saburo Nakanishi、Yoshio Otsuji
DOI:10.1246/cl.1987.2103
日期:1987.10.5
3-Iodo-1-trimethylsiloxypropenes, which were derived by the reaction of α,β-unsaturatedketones and esters with iodotrimethylsilane, gave (η3-1-trimethylsiloxyallylic)Fe(CO)2NO complexes upon treatment with tetrabutylammonium tricarbonylnitrosylferrate. These allylic iron complexes reacted regioselectively with 2-propynyl bromide, giving the corresponding 4-pentynyl ketone and 5-hexynoic ester derivatives.
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
Switching the regioselectivity in the copper-catalyzed synthesis of iodoimidazo[1,2-a]pyridines
作者:Sadhanendu Samanta、Sourav Jana、Susmita Mondal、Kamarul Monir、Swapan K. Chandra、Alakananda Hajra
DOI:10.1039/c6ob00656f
日期:——
regioselective synthesis of 2- and 3-iodoimidazo[1,2-a]pyridines using alkenes/alkynes as coupling partners in the presence of molecular iodine under aerobicreaction conditions. This method was also applied to the synthesis of 2-iodo-3-phenylbenzo[d]imidazo[2,1-b]thiazoles. This protocol offers an easy route towards the synthesis of 2,3-diarylimidazo[1,2-a]pyridines.
已经开发出一种独特的铜催化的2-氨基吡啶双亲核开关,用于在有氧反应条件下,在分子碘存在下,使用烯烃/炔烃作为偶联伙伴,选择性地合成2-和3-碘咪唑并[1,2- a ]吡啶。 。该方法也适用于2-碘-3-苯基苯并[ d ]咪唑并[ 2,1- b ]噻唑的合成。该方案为合成2,3-二芳基咪唑并[1,2- a ]吡啶提供了一条简便的途径。