已经开发了一种新的合成喹唑啉的有效方法。因此,将N- [2-(1-(叠氮基烷基)苯基]甲酰胺1与POCl 3脱水,得到相应的2-(1-叠氮基烷基)苯基异氰酸酯2,然后将其在DMF中于0H下用NaH处理,得到喹唑啉。6通过环化1-(2-异氰基苯基)亚烷基亚胺中间体4得到满意的收率。该方法可用于喹唑啉的7-氮杂类似物的合成,即吡啶并[3,4- d ]嘧啶9。
Synthesis of 2,4,8-Trisubstituted 1,7-Naphthyridines by the Reaction of 4-(1-Aryl-2-methoxyethenyl)-3-isocyanopyridines with Excess Organolithiums
摘要:
AbstractA convenient method for the synthesis of 2,4,8‐trisubstituted 1,7‐naphthyridines 6 by the reaction of (E)‐4‐(1‐aryl‐2‐methoxyethenyl)‐3‐isocyanopyridines 4, which could be easily prepared from commercially available 3‐aminopyridine via aroylation of lithium (4‐lithiopyridin‐3‐yl)pivalamide with N‐methoxy‐N‐methylbenzamides, with excess organolithiums has been developed.