Toward versatile methods leading to highly functionalized imidazo[1,2-a]pyridines
作者:Alexandra Basilio-Lopes、Thiago Mendonça de Aquino、Alexandre Mongeot、Jean-Jacques Bourguignon、Martine Schmitt
DOI:10.1016/j.tetlet.2012.02.117
日期:2012.5
A convenient and general method of preparation of polyfunctionalized imidazo[1,2-a]pyridines is reported. This methodology involves activation of secondary amides leading to the formation of the corresponding amidines 9. Different activating reagents have been evaluated and the efficiency of PCl5 was illustrated with alkyl functionalized groups. (C) 2012 Elsevier Ltd. All rights reserved.
Di Braccio; Roma; Mazzei, Farmaco, Edizione Scientifica, 1988, vol. 43, # 9, p. 705 - 723
BRACCIO, M. DI;ROMA, G.;MAZZEI, M.;BALBI, A.;SCHIANTARELLI, P.;CADEL, S.;+, FARMACO, 43,(1988) N 9, C. 705-723
作者:BRACCIO, M. DI、ROMA, G.、MAZZEI, M.、BALBI, A.、SCHIANTARELLI, P.、CADEL, S.、+
DOI:——
日期:——
Nitrogen bridgehead compounds. Part<b>65</b>. Vilsmeier-haack formylation of 4<i>H</i>-pyrido[1,2-<i>a</i>]pyrimidin-4-ones. Part<b>6</b>
作者:ÁGnes Horváth、István Hermecz
DOI:10.1002/jhet.5570230507
日期:1986.9
2-Substituted 3-formyl-4H-pyrido[1,2-a]pyrimidin-4-ones can be synthethized by Vilsmeier-Haack formylation with the dimethylformamide-phosphoryl chloride complex only from those 4H-pyrido[1,2-a]pyrimidin-4-ones which contain a substituent with electron-releasing resonance effect in position 2. The products were characterized by uv, ir and 1H nmr spectroscopy.
2-取代的3-甲酰基-4- ħ -吡啶并[1,2-一个]嘧啶-4-酮可以通过维尔斯迈尔-哈克甲酰化与二甲基甲酰胺,磷酰氯只对4络合物synthethized ħ -吡啶并[1,2- a ]嘧啶-4-酮,其在2位含有具有电子释放共振效应的取代基。产物通过uv,ir和1 H nmr光谱表征。