Asymmetric induction inDiels-Alder reactions to acrylates derived from chiralsec-alcohols. Preliminary communication
作者:Wolfgang Oppolzer、Mark Kurth、Daniel Reichlin、Christian Chapuis、Martin Mohnhaupt、Frank Moffatt
DOI:10.1002/hlca.19810640841
日期:1981.12.16
prepared; their acrylates II underwent a TiCl4-promoted Diels-Alder addition to cyclopentadiene (Scheme 3, Table) giving in a predictable manner either the (2R)- or the (2S)-adducts III with 63 to 88% asymmetric induction.
从对映体纯的单萜(+)-pulegone(3),(+)-柠檬烯(7),(-)-β-pine烯(9),(+)-和(-)-樟脑(13)或( +) -胆甾烯酮(11)的手性醇4,5,6,8,10,12,14,15,16,17等18制备; 他们的丙烯酸酯II在环戊二烯中进行了TiCl 4促进的Diels-Alder加成反应(方案3,表),以可预测的方式给出了(2 R)-或(2 S)-加合物III,具有63%至88%的不对称诱导。