申请人:Tokuyama Corporation
公开号:EP1547993A1
公开(公告)日:2005-06-29
A spirofluorenol such as 3',9'-dimethoxy-5'-hydroxyspiro[(1H-cyclopent[d,e,f]phenanthrene)-1,7'-benzo[c]fluorene] is produced by protecting a hydroxyl group bonded to a particular fluorenone compound such as 3,9-dimethoxy-5-hydroxybenzo[c]fluorene-7-one with "a substituted silyl group in which the sum of carbon atoms of substituents bonded to a silicon atom is 5 to 12", such as a t-butyldimethylsilyl group, then, reacting the fluorenone compound with a particular organometal compound such as 1-lithiophenanthrene so as to be transformed into a spiro form and, then, removing the protection therefrom. This method makes it possible to efficiently produce the spirofluorenol which is useful as a starting material for producing photochromic compounds.
一种螺芴醇,如 3',9'-二甲氧基-5'-羟基螺[(1H-环戊并[d,e,f]菲)-1,7'-苯并[c]芴],是通过保护与特定芴酮化合物(如 3、9-二甲氧基-5-羟基苯并[c]芴-7-酮 "中的取代硅基,其中与硅原子结合的取代基的碳原子数总和为 5 至 12"、例如 t-丁基二甲基硅基,然后将芴酮化合物与特定的有机金属化合物(例如 1-硫代菲)反应,使其转变为螺环形式,然后去除其中的保护层。这种方法可以有效地生产出螺芴醇,它可以作为生产光致变色化合物的起始原料。