A Novel Synthesis of Quinazolines by Cyclization of 1-(2-Isocyanophenyl)alkylideneamines Generated by the Treatment of 2-(1-Azidoalkyl)phenyl Isocyanides with NaH
作者:Kosuke Ezaki、Kazuhiro Kobayashi
DOI:10.1002/hlca.201300431
日期:2014.6
the synthesis of quinazolines has been developed. Thus, N‐[2‐(1‐azidoalkyl)phenyl]formamides 1 are dehydrated with POCl3 to give the corresponding 2‐(1‐azidoalkyl)phenyl isocyanides 2, which are then treated with NaH in DMF at 0° to give quinazolines 6 in satisfactory yields via cyclization of 1‐(2‐isocyanophenyl)alkylideneamine intermediates 4. This methodology can be applied to the synthesis of the
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。