Enantioselective Fluorination of Spirocyclic β-Prolinals Using Enamine Catalysis
摘要:
A series of spirocyclic carbaldehydes were successfully fluorinated using enamine catalysis, furnishing the corresponding tertiary fluorides in both high yields and enantioselectivities. The fluorinated spirocycles provide a set of novel building blocks interesting from a medicinal chemistry point of view.
Preparation of Spirocyclic β-Proline Esters: Geometrically Restricted Building Blocks for Medicinal Chemistry
摘要:
A series of novel N-Bn-protected spirocyclic -proline esters were prepared using [3+2] cycloaddition and subsequently converted into their corresponding aldehydes. In addition, two novel N-Cbz-protected spirocyclic -proline esters were prepared using intramolecular cyclization starting from simple precursors.