作者: Serdar Sezer , Yasemin Gümrükçü , İrem Bakırcı , M. Yağız Ünver , Cihangir Tanyeli
DOI: 10.1016/J.TETASY.2012.04.016
关键词:
摘要: Abstract The intramolecular Pauson–Khand and ring closing metathesis (RCM) reactions of nitrogen containing chiral enynes dienes are described. enyne diene systems comprised N-propargylated N-allylated units constructed on homoallylic or homopropargylic alcohol backbones, respectively, via S N 2 and/or modified Mitsunobu reactions. racemic derivatives were successfully resolved in high ee (93–99%) by applying chemoenzymatic methods using various lipases such as PS-C II, Lipozyme, CAL-B. Each enantiomerically enriched afforded the most conformationally stable diastereomeric cyclopenta[ c ]pyridine system sole product, whereas gave tetrahydropyridine a result RCM reactions, respectively.