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。