Diastereo- and Enantiocontrolled Synthesis of (-)-Allosedaminevia Cycloaddition of a Chiral Nitrone
作者:Wolfgang Oppolzer、J�rg Deerberg、Osamu Tamura
DOI:10.1002/hlca.19940770217
日期:1994.3.23
(1) has been synthesized, in 21% overall yield, in nine steps starting from the formyl-ester 4. The synthesis features the reaction cascade 7 3 2, involving asymmetricelectrophilicenolatehydroxyamination, hydroxylamine/aldehyde condensation, and nitrone/styrene cycloaddition, as well as the reductive N/O cleavage-decyanation 12 1.