A convenient synthesis of pseudoceratidine and three analogs for biological evaluation
作者:Carsten Behrens、Martin W. Christoffersen、Lone Gram、Per Halfdan Nielsen
DOI:10.1016/s0960-894x(96)00622-1
日期:1997.2
The recently isolated marine natural product pseudoceratidine (1) has been synthesized from 2-trichloroacetylpyrrole. Bromination in the 4- and 5-position followed by nucleophilic displacement of the trichloromethyl group with spermidine gave 1 in 79% yield. The procedure is general and can easily be adopted to the preparation of other derivatives. This was demonstrated by the synthesis of a 5,5'-didebromo derivative (2) and two analogs (3-4). The compounds 1-4 have been tested for antibacterial activity and the results compared to a previous study. Also activity against the marine brine shrimp Artemia salina is reported. (C) 1997, Elsevier Science Ltd.