Four Nucleophilic Additions to Alkenynedioic Acid Derivatives in Tandem; Efficient One-Pot Synthesis of Bicyclo[4.2.0]octenols
作者:Takeshi Hata、Haduki Imade、Hirokazu Urabe
DOI:10.1021/ol300623j
日期:2012.5.18
When alkenynedioic acidderivatives were treated with a Grignard reagent, tandem cyclization and the incorporation of two molecules of the Grignard reagent occurred to give stereodefined bicyclo[4.2.0]octenols via four nucleophilic additions.
Total syntheses of (−)-lycorine and (−)-2-epi-lycorine were accomplished using chiral ligand-controlled asymmetric cascade conjugate addition methodology, which enables the formation of two C−C bonds and three stereogenic centers in one pot to give synthetically useful chiral cyclohexane derivatives.