Cyclobutenone-Based Syntheses of Polyquinanes and Bicyclo[6.3.0]undecanes by Tandem Anionic Oxy-Cope Reactions. Total Synthesis of (±)-Precapnelladiene
作者:James M. MacDougall、Vincent J. Santora、Sharad K. Verma、Philip Turnbull、Cameron R. Hernandez、Harold W. Moore
DOI:10.1021/jo980712w
日期:1998.10.1
by a transannular aldol reaction of the intermediate bicyclo[6.3.0]undecadienone 4. Additional functionality is introduced by alkylation of the enolate 3 resulting from the oxy-Cope rearrangement. Phosphorylation or triflation of enolate 3 provides an entry into the bicyclo[6.3.0]undecane ring system. An application of this new methodology is demonstrated by the total synthesis of the sesquiterpene natural