Olefin addition to acetylated glycals. A new route to C-glycosides.
作者:J. Herscovici、K. Muleka、K. Antonakis
DOI:10.1016/s0040-4039(01)91404-2
日期:1984.1
Olefins react with glycals in the presence of Lewis acids providing a newroute to C-glycosides.
烯烃在路易斯酸的存在下与糖类反应,提供了通往C-糖苷的新途径。
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.