Diastereoselective Synthesis of Enantiomerically Pure 3-Organosulfonyl-2-(2-oxocycloalkyl)-1,3-oxazolidines from 2-Formylcycloalkanones and β-Aminoalkanols

The title compounds (3-arylsulfonyl- or 3-mesyl-2-(2-oxocycloalkyl)-1, 3-oxazolidines) belonging to two different diastereomeric series, are prepared selectively by variation of the condensation conditions. By this, the chiral information of the 2-amino- 1-alkanol is extended to the cycloalkanone ring. Opposite configuration can be set up at the stereogenic center adjacent to the carbonyl group by using the same chiral auxiliary.