2-Methyl-1, 3 (2H, 4H)-isoquinolinedione (I) reacted with methylglyoxal to form 1, 1-bis (2-methyl-1, 3-dioxo-1, 2, 3, 4-tetrahydroisoquinolin-4-yl) acetone (IV) in 58% yield. The Michael reaction of 2-methyl-4-phenacylidene-1, 3 (2H, 4H)-isoquinolinedione (II) with malononitrile gave 1H-pyrano [2, 3-c] isoquinoline (VI) and furo [2', 3' : 2, 3] furo [5, 4-c] isoquinoline (VII) derivatives in a ratio of 2 : 3. In the reaction of IV with malononitrile, retrograde Michael reaction occurred and resulted in the formation of 1, 1H-pyrano [2, 3-c] isoquinoline (IX) and 4-3'-furyl-1, 3 (2H, 4H)-isoquinolinedione (X) derivatives. X-Ray structure analyses of VII and IX were performed.
2-甲基-1, 3 (2H, 4H)-
异喹啉二酮(I)与甲基
乙烯基醛反应生成了 1, 1-双(2-甲基-1, 3-二氧基-1, 2, 3, 4-
四氢异喹啉-4-基)
丙酮(IV),产率为58%。2-甲基-4-苯酰基-1, 3 (2H, 4H)-
异喹啉二酮(II)与
丙二腈发生迈克尔反应,生成1H-
吡喃[2, 3-c]
异喹啉(VI)和
呋喃[2', 3': 2, 3]
呋喃[5, 4-c]
异喹啉(VII)衍
生物,比例为2:3。在IV与
丙二腈的反应中,发生了逆向迈克尔反应,形成了1, 1H-
吡喃[2, 3-c]
异喹啉(IX)和4-3'-
呋喃基-1, 3 (2H, 4H)-
异喹啉二酮(X)衍
生物。对VII和IX进行了X射线结构分析。