Synthesis of Highly Substituted Bicyclo[3.2.0]heptanones from 3-Homoallylcyclobutenones. A Total Synthesis of (±)-Precapnelladiene
作者:James M. MacDougall、Philip Turnbull、Sharad K. Verma、Harold W. Moore
DOI:10.1021/jo970644y
日期:1997.6.13
Oxy-Cope Rearrangements of Bicyclo[3.2.0]heptenones. Synthesis of Bicyclo[4.2.1]non-1(4)-en-6-ones and Bicyclo[5.2.1]dec-1(10)-en-5-ones
作者:Sharad K. Verma、Que H. Nguyen、James M. MacDougall、Everly B. Fleischer、Harold W. Moore
DOI:10.1021/jo991765w
日期:2000.6.1
1]non-1(4)-en-6-ones and the latter to the first examples of bicyclo[5.2.1]dec-1(10)-en-5-ones, compounds having exceptionally strainedbridgeheaddoublebonds. The transformations are controlled by the 6-exo-methyl group in the starting material along with the substituent at position-1 (bridgehead) which force attack of the lithium reagent from the concave face of the starting material, thus allowing the cyclopentenyl
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