Polyfunctionalised lactones with up to five contiguous stereocentres may be prepared with high stereocontrol by a double diastereoselective aldol protocol with protected homochiral α,β-dihydroxy- or α,β-γ-trihydroxyaldehydes and a chiral glycolate oxazolidinone, followed by subsequent O-desilylation and lactonisation.
通过与受保护的同手性α,β-二羟基或α,β-γ-三羟基醛和手性羟基
噁唑烷酮进行双非对映选择性醛醇反应,然后进行 O-去
硅烷化和内酯化反应,可制备出具有最多五个连续立体中心的多官能团内酯,并具有很高的立体控制性。