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.