Diastereo- and enantioselective synthesis of α,β-disubstituted γ-nitro methyl sulfonatesDedicated to Professor Helmut Zahn on the occasion of his 85th birthday.
Abstract
A novel asymmetric synthesis of highly enantioenriched homotaurine precursors has been developed via diastereoselective Michael addition of lithiated enantiopure sulfonates to nitroalkenes by using 1,2∶5,6-di-O-isopropylidene-α-D-allofurano se as chiral auxiliary.