Chiral mercaptoaryl-oxazolines as ligands in enantioselective copper-catalyzed 1,4-additions of Grignard reagents to enones
作者:Zhou Qi-Lin、Andreas Pfaltz
DOI:10.1016/s0040-4020(01)89379-0
日期:1994.4
A series of chiral enantiomerically pure mercaptoaryl-oxazolines has been synthesized. Copper(I) thiolate complexes derived from these ligands proved to be efficient catalysts for the 1,4-addition of Grignard reagents to cyclic enones. Enantioselectivities increased in the sequence cyclopentenone (16–37% ee) < cyclohexenone (60–72% ee) < cycloheptenone (83–87% ee).
已经合成了一系列手性对映体纯的巯基芳基-恶唑啉。衍生自这些配体的硫醇铜(I)络合物被证明是格氏试剂向环状烯酮1,4-加成的有效催化剂。对映选择性按顺序依次增加:环戊烯酮(16-37%ee)<环己烯酮(60-72%ee)<环庚烯酮(83-87%ee)。