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Paper | Regular issue | Vol 51, No. 8, 1999, pp.1827-1842
Published online, 1st January, 1970
DOI: 10.3987/COM-99-8550
General Strategies in the Preparation of Antirhine-Type Indole Alkaloids

Pirjo Hanhinen, Tiina Putkonen, and Mauri Lounasmaa*

*Laboratory for Organic and Bioorganic Chemistry, Technical University of Helsinki, P.O. Box 6100, FIN-02150 HUT Espoo, Finland


Preparation of dimethyl malonyl-substituted indolo[2,3-a]quinolizidine derivative (9), which is a potential synthon in the antirhine (1) series, has been studied. Routes passing through intermediates (22) or (26) are superior to the route passing via intermediate (7), earlier preconized for that purpose.