Stereoselective synthesis of natural product inspired compound library of tetrahydroindolo[2,3-a]quinolizines

Sankar MG, Mantilli L, Bull J, Giordanetto F, Kumar K, Waldmann H

Bioorg Med Chem Lett 2014

Abstract:
A natural product-inspired synthesis of a compound collection embodying the tetrahydroindolo[2,3-a]quinolizine scaffold was established with a five step synthesis route. An imino-Diels–Alder reaction between Danishefsky’s diene and the iminoesters derived from tryptamines was used as a key reaction. Reductive amination of the ketone function and amide synthesis with the carboxylic acid derived from the ethyl ester, were used to decorate the core scaffold. Thus a compound library of 530 tetrahydroindolo[2,3-a]quinolizines was generated and submitted to European lead factory consortium for various biological screenings.

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