Relative to a previous catalyst in which the manganese-porphyrin had four 2,2'-bipyridyl groups, the new catalyst, in the presence of Cu(2+) ions as coordinating linkers, catalyzes the oxidation of a steroid substrate with much better regioselectivity and higher turnover numbers.
[结构:见正文]合成了一种新型催化剂,其中
锰-
卟啉单元在其四个内消旋位置上以反式连接到两个
2,2'-联吡啶基和两个
五氟苯基上。相对于以前的
锰卟啉具有四个
2,2'-联吡啶基的催化剂,该新催化剂在存在Cu(2+)离子作为配位连接体的情况下,催化甾体底物的氧化,具有更高的区域选择性和更高的营业额数字。