Sharpless asymmetric dihydroxylation as the key step in the enantioselective synthesis of spirocyclic σ1 receptor ligands
作者:Katharina Holl、Dirk Schepmann、Constantin Gabriel Daniliuc、Bernhard Wünsch
DOI:10.1016/j.tetasy.2013.12.009
日期:2014.2
The enantioselective synthesis of fluorinated spirocyclic σ1 ligands involved three key steps: (1) the Sharplessasymmetricdihydroxylation of 2-bromostyrene 5 provided enantiomerically pure diols (R)-6 and (S)-6 establishing the stereogenic center; (2) the intramolecular opening of the oxirane ring of (R)-11 and (S)-11, which occurred with excellent regioselectivity and complete inversion of configuration