syn-Selective Aldol Reaction of Propynal-Hexacarbonylcobalt Complexes with Ketene Silyl Acetals
3-Phenylpropynal-hexacarbonylcobalt complex, prepared from 3-phenylpropynal with octacarbonylcobalt, afforded on treatment with the seven-membered ketene trimethylsilyl acetal the syn-aldol product in a highly stereoselective manner.Similar exposure of th