Gallium(III) chloride-catalyzed three-component coupling of naphthol, alkyne and aldehyde: a novel synthesis of 1,3-disubstituted-3H-benzo[f] chromenes
Three-component coupling of naphthol, alkyne and aldehyde has been achieved in the presence of 10 mol % gallium(III) chloride in toluene under reflux conditions to afford the corresponding 1,3-disubstituted-3H-benzo[f]chromenes in good yields. This is the first example on the preparation of chromenes from naphthol, alkyne and aldehyde.
在甲苯中存在10 mol%氯化镓(III)的条件下,在回流条件下,萘酚,炔烃和醛的三组分偶联反应得以实现,从而得到相应的1,3-二取代-3 H-苯并[ f ]色烯。产量。这是从萘酚,炔烃和醛制备二苯甲基苯的第一个实例。
Ultrasound-assisted one-pot synthesis of disubstituted and trisubstituted 1H-benzo[f]chromene derivatives catalyzed by 4-nitro-2,6-diacetylpyridinebis(2,4,6-trimethylaniline)FeCl2
作者:Reza Sandaroos、Saman Damavandi
DOI:10.1007/s11164-012-0933-y
日期:2013.11
1,3-Diaryl-1H-benzo[f]chromenes and 1,3-diaryl-1H-benzo[f]chromen-2-yl)(phenyl)methanones have been synthesized by one-pot three-component reaction of naphthols, aromatic aldehydes, and acetophenone or 1,3-diphenylpropane-1,3-dione, with the bis(imino)pyridine iron-based catalyst 4-nitro-2,6-diacetylpyridinebis(2,4,6-trimethylaniline)FeCl2. This novel, efficient, and rapid method is performed under solvent-free conditions with ultrasonic irradiation.