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- [28] CYCLOADDITIONS .31. CHIRAL DIENOPHILES DERIVED FROM MALIC-ACID - SYNTHESIS OF (Z)-(2S)-(TERT-BUTYL)-5-(ETHOXYCARBONYLMETHYLENE)-1,3-DIOXOLAN-4-ONE AND ITS DIELS-ALDER REACTION WITH CYCLOPENTADIENE SYNTHESIS-STUTTGART, 1990, (07): : 599 - 603