Tandem superelectrophilic hydroarylation of C C bond and carbonyl reduction in cinnamides: synthetic rout to 3,3-diarylpropylamines, valuable pharmaceuticals
摘要:
Cinnamides ArCH=CHCONRR' in reactions with arenes Ar'H under the action of Bronsted (TfOH, FSO3H) or Lewis (AlBr3) superacids at rt for 1-2 h give C=C bond hydroarylation products ArAr'CHCH2CONRR' in yields of 63-98%. Reduction (LiAlH4/Et2O) of carbonyl group in the latter results in the formation of 3,3-diarylpropylamines ArAr'CHCH2CH2NRR', valuable drugs. The reaction intermediates, superelectrophilic dications ArC+H-CH2C(OH+)NRR', have been characterized by DFT calculations in terms of global electrophilicity index, natural charges, and atomic orbitals contributions. (C) 2014 Elsevier Ltd. All rights reserved.
Tandem superelectrophilic hydroarylation of C C bond and carbonyl reduction in cinnamides: synthetic rout to 3,3-diarylpropylamines, valuable pharmaceuticals
摘要:
Cinnamides ArCH=CHCONRR' in reactions with arenes Ar'H under the action of Bronsted (TfOH, FSO3H) or Lewis (AlBr3) superacids at rt for 1-2 h give C=C bond hydroarylation products ArAr'CHCH2CONRR' in yields of 63-98%. Reduction (LiAlH4/Et2O) of carbonyl group in the latter results in the formation of 3,3-diarylpropylamines ArAr'CHCH2CH2NRR', valuable drugs. The reaction intermediates, superelectrophilic dications ArC+H-CH2C(OH+)NRR', have been characterized by DFT calculations in terms of global electrophilicity index, natural charges, and atomic orbitals contributions. (C) 2014 Elsevier Ltd. All rights reserved.
One-pot tandem hydrophenylation and ionic hydrogenation of 3-phenylpropynoic acid derivatives under superelectrophilic activation
作者:Denis I. Nilov、Aleksander V. Vasilyev
DOI:10.1016/j.tetlet.2015.09.026
日期:2015.10
The reactions of esters and amides of 3-phenylpropynoic acid with strong Lewis acids AIX(3) (X = Cl, Br) or conjugate Bronsted-Lewis superacids HX-AIX(3) (X = Cl, Br) in benzene and cyclohexane at room temperature afforded 3,3-diphenylpropanoic acid derivatives in up to 94% yield. This tandem reaction of the acetylene bond proceeded by hydrophenylation followed by ionic hydrogenation. (C) 2015 Published by Elsevier Ltd.