Stereoselective enzyme-catalysed oxidation–reduction reactions of thioacetals–thioacetal sulphoxides by fungi
作者:Barbara J. Auret、Derek R. Boyd、Fiona Breen、Ruth M. E. Greene、Peter M. Robinson
DOI:10.1039/p19810000930
日期:——
bis-(p-tolythio)methane to form the corresponding monosulphoxides occurred in the presence of growing cultures of Aspergillus foetidus and a Helminthosporium species. The degree and preferred direction of stereoselectivity occurring during the asymmetric oxidation and reduction steps was deduced from the enantiomeric excess (e.e.) and absolute stereochemistry of the isolated 1,3-dithian 1-oxide and p-tolythio-(
沙门氏菌(Mortierella isabellina)真菌中存在的酶催化一个氧原子从1,3-二噻吩1氧化物,1,3,5-三噻吩1氧化物和顺-1转移到环硫代乙酸1,3-二噻吩基, 3-二硫1,3-二氧化物。在长曲霉和蠕孢菌的培养物存在下,发生了1,3-二噻吩和无环硫缩醛双-(对甲苯硫基)甲烷的氧化反应,形成相应的单亚砜。物种。从不对称的氧化和还原步骤中发生的立体选择性的程度和优选方向是根据对映体过量(ee)和分离出的1,3-二硫代1-氧化物和对-甲苯硫基-(对-甲苯基亚磺酰基)甲烷的绝对立体化学推论得出的。