1246190-34-0Relevant articles and documents
Catalytic selective cyclizations of aminocyclopropanes: Formal synthesis of aspidospermidine and total synthesis of goniomitine
De Simone, Filippo,Gertsch, Jürg,Waser, Jér?me
, p. 5767 - 5770 (2010)
(Figure Presented) Mild control: Selective cyclization of aminocyclopropanes at either the N1 or C3 position of an indole ring was achieved by tuning the reaction conditions (see scheme). This strategy was applied to the formal synthesis of aspidospermidi
Total synthesis and biological evaluation of jerantinineE
Frei, Reto,Staedler, Davide,Raja, Aruna,Franke, Raimo,Sasse, Florenz,Gerber-Lemaire, Sandrine,Waser, Jerome
, p. 13373 - 13376 (2014/01/06)
Nature's beauty: The first total synthesis of the alkaloid natural product jerantinineE is based on a selective cyclization of an aminocyclopropane. Preliminary investigations show that it inhibits the polymerization of tubulin, displaying significant cytotoxicity and antimigratory activity against both breast and lung cancer cell lines.
Indole alkaloids synthesis via a selective cyclization of aminocyclopropanes
De Simone, Filippo,Waser, Jerome
, p. 233 - 236 (2012/07/28)
The continuous progress in medicinal chemistry requires more versatile synthetic strategies for the generation of large libraries of active compounds and their analogues. As a result, the research for new effective cyclization and cycloaddition reactions is an essential task in organic chemistry. In 2008 we developed the first catalytic formal homo-Nazarov reaction starting from activated cyclopropanes. Herein we report the extension of the catalytic formal homo-Nazarov cyclization to aminocyclopropanes. Highly diastereoselective cyclizations were obtained via an acyliminium intermediate generated through opening of the cyclopropane. An excellent control over the regioselectivity of either the C-C or C-N cyclization in the case of free indoles as nucleophilic partners was achieved. The utility of the developed methodology was demonstrated by the generation of the polycyclic scaffolds of Aspidosperma and Gonioma natural products starting from a common intermediate. Based on this method, a formal total synthesis of the alkaloid aspidospermidine and the total synthesis of the alkaloid goniomitine are presented. Finally, the scope and limitations of our methodology are discussed on an extended range of vinyl-cyclopropyl ketones with cyclic or acyclic carbamates, as well as ethers as donor groups on the cyclopropane. Schweizerische Chemische Gesellschaft.
