(R)-1-Acetyl-5-isopropoxy-3-pyrrolin-2-one: a versatile chiral dienophile from (S)-malic acid
摘要:
The title compound, readily prepared from (S)-malic acid, reacts as a Diels-Alder dienophile with several 1,3-dienes with excellent regio- and stereoselectivity without loss of enantiomeric purity. The synthesis of an enantiomerically pure intermediate in a projected synthesis of gelsemine is detailed.