accomplished. Two of the four chiral centers are controlled by an external chiral auxiliary and the other two are synthesized stereoselectively, one by a novel 1,4-asymmetric induction using cobalt-alkyne complex, and the other by 1,3-asymmetric induction.
已经完成了受保护的去
磷酸钙丝素的合成,从而正式合成了泊丝汀。四个手性中心中的两个由外部手性助剂控制,另两个通过立体选择性合成,一个通过使用
钴-炔配合物的新型1,4-不对称诱导,另一个通过1,3-不对称诱导。