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利用BF3·EtO关环形成吡喃合成黄烷化合物是一种新的简便方法,用此方法合成了两种天然化合物7-羟基-3’,4’-甲二氧基黄烷和4’羟基-7-甲氧基黄烷.
The synthesis of pyran compounds by ring closure with BF3 · EtO is a new and simple way to synthesize two natural compounds, 7-hydroxy-3 ’, 4’-methylenedioxyalkane and 4’ -7-methoxyflavan.