5,7-Dimethoxy-4-(4-hydroxyphenyl)-2H-1-benzopyran-2-one and 5,7-dimethoxy-4-(4-methoxyphenyl)-2H-1-benzopyran-2-one, two new neoflavonoids occurring in Courtarea hexandra have been synthesized via Pechmann condensation. Attempts made to synthesize another 4-arylcoumarin, 5-hydroxy-7-methoxy-4-(2,5-dihydroxyphenyl)-2H-1-benzopyran-2-one, constituent of the same plant, led to the formation of the hitherto
5,7-二甲氧基-4-(
4-羟基苯基)-2H-1-苯并
吡喃-2-one和5,7-二甲氧基-4-(4-
甲氧基苯基)-2H-1-苯并
吡喃-2-one,两个新的Courtarea hexandra 中的新
黄酮类化合物是通过 Pechmann 缩合合成的。尝试合成另一种 4-芳基
香豆素、5-羟基-7-甲氧基-4-(2,5-二羟基苯基)-2H-1-苯并
吡喃-2-one,同一植物的成分,导致了迄今为止的形成未知 2-ethoxy-6-hydroxy-4H-1-benzopyran-4-one。