A chemoenzymatic process for the stereoselective preparation of both the (R) and (S) enantiomers of 3-hydroxy-3-(2-thienyl) propanenitrile has been developed. These optically pure key intermediates were prepared by enzymatic resolution of (±)3-hydroxy-3-(2-thienyl) propanenitrile both by transesterification and by hydrolysis reaction which were then transformed to both enantiomers of duloxetine.
                            一种
化学酶法过程已经被开发用于选择性制备3-羟基-3-(2-
噻吩基)
丙腈的(R)和(S)对映体。这些光学纯的关键中间体是通过对(±)3-羟基-3-(2-
噻吩基)
丙腈进行酶解得到的,包括酯交换和
水解反应,然后转化为
度洛西汀的两个对映体。