Bis(2-hydroxy-1-naphthyl)methane derivatives have been efficiently converted to their corresponding spirans through three methods, i.e. oxidation by TCCA under mild reaction conditions, Ph3Bi catalyzed air oxidation, and by electrochemical reaction. The first two methods are diastereoselective and give either of the two possible diastereomers, while the electrochemical method produces equal amounts
双(2-羟基-1-
萘基)
甲烷衍
生物已通过三种方法有效转化为相应的螺喃,即在温和的反应条件下通过
TCCA氧化,Ph 3 Bi催化的空气氧化以及通过电
化学反应。前两种方法是非对映选择性的,并给出两种可能的非对映异构体中的任一种,而电
化学方法则产生等量的这些非对映异构体。