新的5,3‘,5’—三羟基7—甲氧基黄酮及其一二和三苄氧基衍…

Synthesis of a Novel 5,3',5'-Trihydroxy-7-methoxyflavoneand Its Mono-,Dibenzyloxy-derivatives via Selective Deben- zylation of 5,3',5'-Tribenzyloxy-7-methoxvflavone

通过３．５－二苄氧苯甲酸‘－２，６－二羟基－４－甲氧基苯丙酮酯进行Ｂａｋｅｒ－Ｖｅｎｋａｔａｒａｍａｎ重排，环化合成了５，３’，５’－三苄氧基－７－甲氧基黄酮，然后选择性才全部地脱苄基得到５，３’，５’－三羟基－７－甲氧基黄酮及其一和二－苄基衍生物。

The novel compound 5,3',5'-trihydroxy-7-methOxyflavone was synthe sized twi complete debenzylation of 5,3',5'-tribenzyloxy-7-methoxyflavone,The latter was also selectively debenzylated to give the mono-and di-benzyloxyflavone.