为了阐明(3S)-雌马酚生物合成的机理,在Eggerthella株Julong 732中合成了(2,3,4 - d 3)-反式-THD并通过THD还原酶转化为(3S)-雌马酚。在(3氘原子小号)-equol通过测定1 H NMR和2 H-NMR光谱,并将产物经鉴定为(2,3,4- α - d 3) - (3小号)-雌马酚。所有氘原子均被保留,而C-4处的OH基团被保留结构的氢原子取代。为了解释这种立体定向还原中的氘保留,我们提出了一种涉及自由基中间体的机制。
Conversion of (3<i>S</i>,4<i>R</i>)-Tetrahydrodaidzein to (3<i>S</i>)-Equol by THD Reductase: Proposed Mechanism Involving a Radical Intermediate
作者:Mihyang Kim、E. Neil G. Marsh、Soo-Un Kim、Jaehong Han
DOI:10.1021/bi100465y
日期:2010.7.6
To elucidate the mechanism of (3S)-equol biosynthesis, (2,3,4-d3)-trans-THD was synthesized and converted to (3S)-equol by THD reductase in Eggerthella strain Julong 732. The position of the deuterium atoms in (3S)-equol was determined by 1H NMR and 2H NMR spectroscopy, and the product was identified as (2,3,4α-d3)-(3S)-equol. All the deuterium atoms were retained, while the OH group at C-4 was replaced
为了阐明(3S)-雌马酚生物合成的机理,在Eggerthella株Julong 732中合成了(2,3,4 - d 3)-反式-THD并通过THD还原酶转化为(3S)-雌马酚。在(3氘原子小号)-equol通过测定1 H NMR和2 H-NMR光谱,并将产物经鉴定为(2,3,4- α - d 3) - (3小号)-雌马酚。所有氘原子均被保留,而C-4处的OH基团被保留结构的氢原子取代。为了解释这种立体定向还原中的氘保留,我们提出了一种涉及自由基中间体的机制。