Abstract
A number of aminoacyl triesters of squamocin 1, a cytotoxic acetogenin isolated from the seeds of Annona reticulata, have been synthesized in two to three steps from protected (l)-aminoacids and squamocin 1 using standard coupling/deprotection procedures. These semisynthetic analogs were tested on submitochondrial particles (SMP) for their complex I inhibitory activities, and against KB 3-1 cells in vitro. All triesters derivatives exhibited a complete extinction of activity at the enzymatic level, correlated to a reduced though modulated cytotoxicity in comparison with squamocin 1. This activity can apparently be considered as a function of the amphipathy of the analogs, the more amphiphilic ones being the more cytotoxic.
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