作者:Kevin S. Huang、Makhluf J. Haddadin、Mark J. Kurth
DOI:10.1021/jo016387l
日期:2002.4.1
The reactions of symmetrical and unsymmetrical 2,2'-dipyridylamines with 1,2-dibromoethane and 1,3-dibromopropane give imidazopyridinium and pyridopyrimidium bromides, respectively. These acetone/CH(2)Cl(2)-insoluble, highly fluorescent quaternary ammonium salts undergo addition/ring opening upon treatment with methanolic KOH to give pyridin-2-one derivatives. A sequential N,N-dialkylation/ring-opening
对称和不对称的2,2'-二吡啶胺与1,2-二溴乙烷和1,3-二溴丙烷的反应分别得到咪唑并吡啶鎓和吡啶并嘧啶溴化物。这些丙酮/ CH(2)Cl(2)不溶的高荧光度季铵盐在用甲醇KOH处理后会发生加成/开环反应,从而得到吡啶-2-酮衍生物。为构建不对称的双(吡啶-2-酮),开发了一种顺序的N,N-二烷基化/开环水解/ N,N-二烷基化/开环水解策略。