Preparation of (<i>R</i>)-(2-Cyclopentenyl)methanol and the First Total Synthesis of (8<i>R</i>,11<i>R</i>)-Precapnelladiene
作者:Koji Maeda、Yoshinobu Inouye
DOI:10.1246/bcsj.67.2880
日期:1994.10
Enantiometrically pure (R)-(2-cyclopentenyl)methanol (2) was prepared from ethyl 2-oxocyclopentanecarboxylate. Coupling of 2 with 4,4-dimethyl-3-phenylthio-2-cyclohexenone gave an enol ether, which...
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
Total synthesis of the marine natural product (±)-precapnelladiene
作者:Goverdhan Mehta、A. Narayana Murty
DOI:10.1039/c39840001058
日期:——
A stereo-controlled total synthesis of the novel sesquiterpene precapnelladiene (1), isolated from the soft coral Capnella imbricata, is reported; the synthesis unequivocally establishes the stereochemistry of the natural product as (1).