L'etude est faite sur desvinylallenes comme le benzosulfinyl-3' allenyl-1 trimethyl-2,6,6 cyclohexene。Le groupe sulfoxyde est un substituant qui non seulement exerce uneceleration du deplacement [1,5] mais aussi peut egalement Impacter le controle de lastereoselection π-faciale dans cessyntheses de trienes
Protecting-Group-Free Synthesis of Taiwaniaquinone H Using a One-Pot Thermal Ring Expansion/4π-Electrocyclization Strategy
摘要:
A strategy to the 6-5-6 tricyclic scaffold of taiwaniaquinoids was established on the basis of a one-pot thermal ring expansion/4 pi-electrocyclization process. The efficiency of this methodology has been demonstrated through its application in the total synthesis of taiwaniaquinone H, which has been accomplished in three steps and 14% overall yield in a protecting-group-free manner starting from commercially available materials.