Quinoxalino[2,3-<i>c</i>]cinnolines and Their 5-<i>N</i>-Oxide: Alkoxylation of Methyl-Substituted Quinoxalino[2,3-<i>c</i>]cinnolines to Acetals and Orthoesters
作者:Makhluf J. Haddadin、Mirna El-Khatib、Tharallah A. Shoker、Christine M. Beavers、Marilyn M. Olmstead、James C. Fettinger、Kelli M. Farber、Mark J. Kurth
DOI:10.1021/jo201687x
日期:2011.10.21
We report the alkoxylation of methyl-substituted quinoxalino[2,3-c]cinnolines to give acetals and orthoesters in high yields. Routes to the precursors of this alkoxylation reaction as well as other quinoxalino[2,3-c]cinnoline and their 5-oxide derivatives are reported. Most of these quinoxalino[2,3-c]cinnolines were prepared by cyclization of the corresponding 2-amino-3-(2-nitrophenyl)quinoxaline,
我们报告甲基取代的喹喔啉[2,3- c ] cinnolines的烷氧基化以高收率得到乙缩醛和原酸酯。据报道,该烷氧基化反应的前体以及其他喹喔啉[2,3- c ] cinnoline及其5-氧化物衍生物的途径。这些喹喔啉[2,3- c ]喹啉中的大多数是通过相应的2-氨基-3-(2-硝基苯基)喹喔啉的环化反应制备的,这反过来又是苯并呋喃山氧化物加2-硝基苄基氰化物引起的异常贝鲁特反应的结果。 。提出了这些有趣反应的机械解释。