Methods for indole alkaloid synthesis. A study of the compatibility of the indole-2,3-quinodimethane strategy for the synthesis of 16-methoxy-substituted aspidosperma-type alkaloids. Synthesis of (+)- and (-)-16-methoxytabersonine
Highly Efficient Nickel-Catalyzed Cross-Coupling of Succinic and Glutaric Anhydrides with Organozinc Reagents
作者:Eric A. Bercot、Tomislav Rovis
DOI:10.1021/ja044588b
日期:2005.1.1
introduction of molecular complexity through the use of functionalized coupling partners. Regioselective alkylation of an unsymmetrical succinic anhydride and a profound effect of pendent coordinating olefins on reaction rate suggest a mechanism involving discrete oxidative addition of the nickel complex into the cyclicanhydride followed by a transmetalation event.
A Mild and Efficient Catalytic Alkylative Monofunctionalization of Cyclic Anhydrides
作者:Eric A. Bercot、Tomislav Rovis
DOI:10.1021/ja017086w
日期:2002.1.1
of substrates, employs commercially available or readily attainable reagents, tolerates sensitive functionality on both partners, and affords the product ketoacids in moderate to high yields. The use of a chiral phosphinooxazoline results in a desymmetrization of a meso anhydride to provide the ketoacid in 85% yield and 79% ee.
Methods for indole alkaloid synthesis. A study of the compatibility of the indole-2,3-quinodimethane strategy for the synthesis of 16-methoxy-substituted aspidosperma-type alkaloids. Synthesis of (+)- and (-)-16-methoxytabersonine
作者:Kevin. Cardwell、Brian. Hewitt、Mark. Ladlow、Philip. Magnus