A Flexible, Convergent Approach to Polycyclic Indole Structures: Formal Synthesis of (±)-Mersicarpine
作者:Aurélien Biechy、Samir Z. Zard
DOI:10.1021/ol900996k
日期:2009.7.2
The formal synthesis of (±)-mersicarpine was achieved using an intermolecularradical addition−radical cyclization cascade. This key reaction represents a flexible, convergent route to numerous polycyclic indole derivatives.
Al-Catalyzed Facile Construction of Quaternary CC Bonds by the Allylic Substitution of Tertiary Alcohols: A Concise and Formal Synthesis of (±)-Mersicarpine
作者:Xue Zhong、You Li、Fu-She Han
DOI:10.1002/chem.201201344
日期:2012.8.6
In close quarters: A concise, high‐yielding, and more sustainable route for the synthesis of (±)‐mersicarpine in nine linear steps from commercially available indole and succinic anhydride is presented (see scheme). It is also demonstrated that the novel protocol can be commonly used for the rapid and flexible construction of a diverse class of mersicarpine analogues.
The asymmetric total synthesis of (−)-leuconoxine has been achieved. The desymmetrization of a prochiral diester using a chiral phosphoric acid catalyst produced a highly enantioenriched lactam with excellent yield. The ring construction featuring an intramolecular N-acyliminium cyclization and the one-step pyrrolidone formation using Bestmann’s ylide was successfully accomplished.