作者:Rodrigo Abonia、Braulio Insuasty、Jairo Quiroga、Heinz Kolshorn、Herbert Meier
DOI:10.1002/jhet.5570380321
日期:2001.5
and catalytic amounts of acetic acid leads to 4,5-dihydropyrrolo[1,2-a]quinoxalines in high yields. When aliphatic aldehydes were used under the same conditions, a slow oxidation to the corresponding pyrrolo[1,2-a]quinoxalines can occur; the oxidation can be avoided by preparing in situ the 5-acetyl derivatives of the 4,5-dihydropyrrolo[1,2-a]quinoxalines.
1-(2-氨基苯基)吡咯与芳族或杂芳族醛在乙醇中的反应和催化量的乙酸反应可高产率地产生4,5-二氢吡咯并[1,2- a ]喹喔啉。在相同条件下使用脂族醛时,可能会缓慢氧化为相应的吡咯并[1,2- a ]喹喔啉;通过原位制备4,5-二氢吡咯并[1,2- a ]喹喔啉的5-乙酰基衍生物可以避免氧化。