The present invention pertains to a process for preparing a compound of Formula I that is achiral, racemic or enantiomerically enriched at the hydroxylation center indicated by comprising contacting a compound of Formula II with an oxidant selected from oxygen, hydrogen peroxide, peracids or alkyl hydroperoxides in the presence of a zirconium complex, wherein R1, R2 and R3 are as defined in the disclosure. This invention also pertains to zirconium complexes useful in this procedure comprising zirconium and a ligand of Formula III or its enantiomer wherein J, R6 and n are as defined in the disclosure. This invention further pertains to a compound of Formula III or its enantiomer.
本发明涉及一种制备公式I化合物的方法,该化合物是在羟化中心处无手性、外消旋或对映富集的,包括将公式II化合物与氧、
过氧化氢、过酸或烷基过氧化物等氧化剂在
锆配合物的存在下接触,其中R1、R2和R3如本公开说明书所定义。本发明还涉及在该过程中有用的
锆配合物,包括
锆和公式III或其对映体的
配体,其中J、R6和n如本公开说明书所定义。本发明进一步涉及公式III或其对映体的化合物。