Reduction by a Model of NAD(P)H. 32. Stereoselective Reduction of Camphoroquinone by a Chiral NAD(P)H Model
作者:Atsuyoshi Ohno、Takehiko Goto、Jun-ichi Nakai、Shinzaburo Oka
DOI:10.1246/bcsj.54.3478
日期:1981.11
(+)-, (−)-, and racemic camphoroquinones (CQ) were reduced by each of four NAD(P)H-models such as N-(α-methylbenzyl)-1-propyl-2,4-dimethyl-1,4-dihydronicotinamide (Me2PNPH) in the presence of magnesium ion in acetonitrile with a view to elucidating the intermolecular arrangement in the transition state for asymmetric reduction. Partial rate factors for each attacking mode were calculated. Electronegative
Abstract The reduction of (+)-camphorquinone by the plant pathogen Glomerellacingulata produced (+)-2- exo -3- exo -2,3-diol with high stereoselectivity, whereas (−)-camphorquinone yielded (+)-2- endo -3- exo -2,3-diol with high stereo- and enantioselectivity.
Abstract (+)- and (−)-Camphorquinones were readily reduced by various fungi. The reduction of (−)-camphorquinone by Aspergillus niger produced mainly (+)-2 R - endo -hydroxyepicamphor with high stereoselectivity whereas reduction of (+)-camphorquinone by Glomerella cingulata and Mucor mucedo afforded (−)-3 S - exo -hydroxycamphor with stereoselectivity.
摘要 (+)- 和 (-)-樟脑醌很容易被各种真菌还原。黑曲霉对 (-)-樟脑醌的还原主要产生具有高立体选择性的 (+)-2 R - 内-羟基表樟脑,而扣带球藻和毛霉对 (+)-樟脑醌的还原产生 (-)-3 S - exo -具有立体选择性的羟基樟脑。
Biotransformation of (+)- and (−)-camphorquinones by plant cultured cells
Biotransformation of (+)- and (-)-camphorquinones with suspension plant culturedcells of Nicotiana tabacum and Catharanthus roseus was investigated. It was found that the plant culturedcells of N. tabacum and C. roseus reduce stereoselectively the carbonyl group of (+)- and (-)-camphorquinones to the corresponding alpha-keto alcohols.