5,7-dihydroxy-4-(4-hydroxyphenyl)-2H-1-benzopyran-2-one(1), 5,7-dihydroxy-3-(4-hydroxyphenyl)-2H-1-benzopyran-2-one(2) and their derivatives 3 - 6. It has been assigned a novel structure having the phenyl substituent in the benzenoid ring of the coumarin nucleus - 4,5-dihydroxy-7-(4-hydroxyphenyl)-2H-1-benzopyran-2-one(11).
通过合成5,7-二羟基-4-(
4-羟基苯基)-2H-1-苯并
吡喃-2-one(1),5,7-二羟基-3-(
4-羟基苯基)-2H-1-苯并
吡喃-2-酮(2)及其衍
生物3-6。在
香豆素核的苯环中具有苯基取代基的新型结构-4,5-二羟基- 7-(
4-羟基苯基)-2H-1-苯并
吡喃-2-酮(11)。