申请人:Burdet Bruno
公开号:US20050256321A1
公开(公告)日:2005-11-17
A process for manufacturing a hydroxylated isoflavone of the formula (I) given in the description comprises re-acting an appropriately substituted 2-hydroxydeoxybenzoin of the formula (II), also given in the description, with a formic acid anhydride of the formula HCOOCOR3, wherein R
3
signifies C
2-20
-alkyl or various other groups as given in the description, in presence of a base or in a solvent which acts as a base, and if necessary promoting the ensuing hydrolysis of the so-produced acylated form of the hydroxylated isoflavone of the formula I by acidification. Of particular interest as products of this process are the 5,7dihydroxyisoflavones, e.g. genistein (5,7,4′-trihydroxyisoflavone). Isoflavones display many useful biochemical effects.
制造式(I)中给出的羟基异黄酮的过程包括将式(II)中适当取代的2-羟基脱氧苯并与式HCOOCOR3的甲酸酐反应,其中R3表示C2-20烷基或其他在说明书中给出的基团,存在碱或作为碱的溶剂,必要时通过酸化促进所产生的酰化羟基异黄酮的水解。此过程的特别有趣的产物是5,7-二羟基异黄酮,例如根皮素(5,7,4'-三羟基异黄酮)。异黄酮具有许多有用的生化效应。