ChemInform Abstract: Synthesis of Optically Active 5-Substituted-2-pyrrolidinone Derivatives Having Atropisomeric Structure and 3,5-cis-Selective Reaction of Their Enolates with Electrophiles.
Abstract
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ChemInform Abstract
Starting from the butyrolactone (I) the pyrrolidinone (IV) having atropisomerism and the derivative (IX) having an atropisomerism-like structure can be prepared in optically pure form. The reaction of their Li-enolates with electrophiles allows stereoselective formation of 3,5-cis-substituted products, which is unusual.