Hydroxyl groups at C-3 and at C-17 of the unnatural enantiomer, ent-androsta-5,9(11)-diene-3β,17β-diol are oxidised by cholesterol oxidase from Rhodococcus erythropolis
作者:Dai Kitamoto、Serge Dieth、Alain Burger、Denis Tritsch、Jean-François Biellmann
DOI:10.1016/s0040-4039(00)02005-0
日期:2001.1
The ent-androsta-4,9(11)-diene-3β,17β-diol 1b and ent-androsta-5,9(11)-diene-3β,17β-diol 2b prepared from chiral dione 3, were oxidised by cholesterol oxidase with kinetic parameters close to those of the natural steroids 1a and 2a. In the preparative oxidation the final product was ent-androsta-4,9(11)-diene-3,17-dione 5. So the enzyme catalysed the oxidation of the hydroxyl groups at C-3 and C-17
由手性二酮3制备的ent -androsta-4,9(11)-diene-3β,17β-二醇1b和ent -androsta-5,9(11)-diene-3β,17β-二醇2b被胆固醇氧化氧化酶的动力学参数接近天然类固醇1a和2a。在制备氧化的最终产物是ENT -雄-4,9(11) -二烯-3,17-二酮5。因此,该酶催化C-3和C-17处羟基的氧化,而天然对映异构体仅在C-3处被氧化。