Subject of the invention is a method for enantioselective production of an isoflavane from an isoflavone, comprising the steps: (a) selectively reducing the isoflavone, such that the 4-keto group of the isoflavone is converted to a 4-hydroxy group, and the 2,3-double bond of the isoflavone is converted to a 2,3-single bond, thereby obtaining a 4-hydroxy intermediate, and (b) reacting the 4-hydroxy intermediate with a chiral reagent, such that a chiral group is covalently attached to the C4-position of the 4-hydroxy intermediate, thereby obtaining a chiral intermediate. The invention also relates to intermediates of formulae (IV), (V), (VI) and (VII) obtainable in the inventive process.
该发明涉及一种从异
黄酮生产异黄素的对映选择性方法,包括以下步骤:(a) 选择性还原异
黄酮,使得异
黄酮的4-酮基转化为
4-羟基,并使得异
黄酮的2,3-双键转化为2,3-单键,从而获得
4-羟基中间体;(b) 将
4-羟基中间体与手性试剂反应,使得手性基团共价连接到
4-羟基中间体的C4位置,从而获得手性中间体。该发明还涉及在该创新过程中可获得的式(IV)、(V)、(VI)和(VII)的中间体。