1-Methyl-1-azacyclohexa-2,3-diene(N−B)borane − Generation and Interception of an Unsymmetrical Isodihydropyridine
作者:Stefan Drinkuth、Stefan Groetsch、Eva-Maria Peters、Karl Peters、Manfred Christl
DOI:10.1002/1099-0690(200107)2001:14<2665::aid-ejoc2665>3.0.co;2-i
日期:2001.7
3-bromo-1-methyl-1,2,5,6-tetrahydropyridine (6) with borane−dimethyl sulfide. Whereas no trapping product of the possible intermediate 1-methyl-1-azacyclohexa-2,3-diene (4) could be observed on treatment of 6 with potassium tert-butoxide in the presence of furan, the subjection of 7 to the same conditions produced the hexahydroepoxyquinoline derivatives 8a−c. Treatment of 7, dissolved in styrene, with sodium
3-溴-1-甲基-1,2,5,6-四氢吡啶(NB)硼烷 (7) 由 3-溴吡啶转化为 3-溴-1-甲基吡啶鎓碘化物,后者用钠氢化四氢硼酸盐并用硼烷-二甲硫醚处理所得的 3-溴-1-甲基-1,2,5,6-四氢吡啶 (6)。虽然在呋喃存在下用叔丁醇钾处理 6 时没有观察到可能的中间体 1-甲基-1-氮杂环六-2,3-二烯 (4) 的捕集产物,但在相同条件下处理 7产生了六氢环氧喹啉衍生物 8a-c。用双(三甲基甲硅烷基)酰胺钠处理溶解在苯乙烯中的 7 得到六氢环丁吡啶衍生物 9a-c。六元环丙二烯 1-methyl-1-azacyclohexa-2,