Manganese(III)-Promoted Tandem Oxidation and Cyclization of β-Keto Ester Derivatives of Terpenoids
作者:Zhilong Li、Heejung Jung、Mira Park、Myoung Soo Lah、Sangho Koo
DOI:10.1002/adsc.201100215
日期:2011.8
A new type of terpenoid cyclization directed by a β-keto ester moiety has been developed, which proceeded by manganese(III)-initiated oxidation of the β-keto ester, followed by an intramolecular hetero Diels–Alder reaction with the terpenoid chain. This reaction produces polycyclic dihydropyrans in high yields and stereoselectivities under mild conditions.
已经开发出一种由β-酮酸酯部分指导的新型萜类环化,该过程通过锰(III)引发的β-酮酯的氧化,然后与萜类链发生分子内杂Diels-Alder反应。该反应在温和条件下以高收率和立体选择性产生多环二氢吡喃。