Diastereoselective and enantioselective hydrogenation of the racemic beta-keto ester 5 to give the enantiomerically pure (96% ee) ester 8 is reported. The conversion of the derived vinylstannane 11 to the antibiotic marine alkaloid (-)-haliclonadiamine (1) is describedl.
Diastereoselective and enantioselective hydrogenation of the racemic beta-keto ester 5 to give the enantiomerically pure (96% ee) ester 8 is reported. The conversion of the derived vinylstannane 11 to the antibiotic marine alkaloid (-)-haliclonadiamine (1) is describedl.
Samarium(II) iodide-induced tandem reductive coupling-Dieckmann condensation reaction: one-step synthesis of bicyclic oxacyclopentanecarboxylate from bis-α,β-unsaturated esters
The tandem cyclization of bis-α,β-unsaturated esters with SmI2-Sm–THF in the presence of catalytic amount of methanol was found to stereoselectively provide bicyclo[4.3.0]nonan-8-ones and bicyclo[3.3.0]octan-3-ones.