Piperodione (3), a secondary metabolite previously isolated from the Javanese pepper plant Piper retrofractum in 0.0002% isolated yield was synthesized in a convergent strategy utilizing a Mannich and a Stetter reaction. An over-all yield of 76% could be achieved. Several analogs were prepared by this synthetic sequence. None of the compounds showed a significant cytotoxicity for human tumor cells (photometric sulforhodamine B assay). (C) 2014 Elsevier Ltd. All rights reserved.
Piperodione (3), a secondary metabolite previously isolated from the Javanese pepper plant Piper retrofractum in 0.0002% isolated yield was synthesized in a convergent strategy utilizing a Mannich and a Stetter reaction. An over-all yield of 76% could be achieved. Several analogs were prepared by this synthetic sequence. None of the compounds showed a significant cytotoxicity for human tumor cells (photometric sulforhodamine B assay). (C) 2014 Elsevier Ltd. All rights reserved.
Frankland; Ormerod, Journal of the Chemical Society, 1903, vol. 83, p. 1348