Catalytic Action of Azolium Salts. IV. Preparations of 4-Aroylquinazolines and 4-Aroyl-1H-pyrazolo(3,4-d)pyrimidines by Catalytic Action of 1,3-Dimethylimidazolium Iodide.
作者:Akira MIYASHITA、Hideaki MATSUDA、Yumiko SUZUKI、Ken-ichi IWAMOTO、Takeo HIGASHINO
DOI:10.1248/cpb.42.2017
日期:——
The ability of 1, 3-dimethylimidazolium iodide (1) to catalyze the aroylation of the chloroheteroarenes 4-8 with arenecarbaldehydes 3 as sources of the aroyl groups was examined in order to develop a preparative method of aroylheteroarenes. In the presence of 1, the treatment of the 4-chloroquinazolines (4 : 2-H, 5 : 2-Me, 6 : 2-Ph) with arenecarbaldehyde 3 in refluxing THF (tetrahydrofuran) or dioxane led to the 4-aroylquinazolines (9 : 2-H, 10 : 2-Me, 11 : 2-Ph) in excellent yields, as had been found with 1, 3-dimethylbenzimidazolium iodide (2). Similar reaction of the 4-chloro-1H-pyrazolo[3, 4-d]pyrimidines (7 : 1-Ph, 8 : 1-Me) with arenecarbaldehyde 3 yielded the corresponding 4-aroyl-1H-pyrazolo[3, 4-d]pyrimidines (12 : 1-Ph, 13 : 1-Me). Compound 1 seems to catalyze the aroylation of a wider range of arenecarbaldehydes 3 as compared with 2.
研究了1,3-二甲基咪唑锭碘化物(1)催化氯杂芳烃4-8与芳烯羰基化合物3的芳酰基化反应的能力,以开发一种合成芳酰杂芳烃的新方法。在存在1的条件下,4-氯喹唑啉(4:2-H,5:2-Me,6:2-Ph)与芳烯羰基化合物3在回流的THF(四氢呋喃)或二噁烷中反应,得到了优良产率的4-芳酰喹唑啉(9:2-H,10:2-Me,11:2-Ph),这与1,3-二甲基苯并咪唑锭碘化物(2)得到的结果一致。类似地,4-氯-1H-吡唑[3,4-d]嘧啶(7:1-Ph,8:1-Me)与芳烯羰基化合物3反应,得到了相应的4-芳酰-1H-吡唑[3,4-d]嘧啶(12:1-Ph,13:1-Me)。与2相比,化合物1似乎能催化更广泛的芳烯羰基化合物3的芳酰基化反应。