A facile synthesis of fluorine-containing heterocycles - use of 1,1,1-trifluoro-2-alkanones as a convenient synthetic intermediate
作者:Yasuhiro Kamitori
DOI:10.1002/jhet.5570380339
日期:2001.5
3-alkanediones 2 easily obtainable from various aldehyde dialkylhydrazones were reacted with several diamines to afford trifluoromethylquinoxalines 3 and trifluoromethylpyrazines 4 in good yields. With the use of aldehydes and aqueous ammonia instead of diamines, diketones 2 were successfully converted to the corresponding 4-trifluoromethylimidazoles 5 in satisfactory yields.
容易从各种醛二烷基hydr得到的1,1,1-三氟-2,3-烷二酮2与几种二胺反应,以高收率得到三氟甲基喹喔啉3和三氟甲基吡嗪4。通过使用醛和氨水代替二胺,二酮2以令人满意的产率成功转化为相应的4-三氟甲基咪唑5。