Syntheses and Preliminary Biological Evaluations of the Dibromopyrrole‐Containing Marine Natural Products Agesasine A, Agesasine B, Longamide E and Various Congeners
作者:Chengzhi Chen、Tingting Yuan、Ping Lan、Lorenzo V. White、Jing Chen、Martin Banwell
DOI:10.1002/ejoc.202300003
日期:——
synthesis of various, recently reported, marine-derived, pyrrole-containing natural products are reported. The evaluation of these and certain congeners, some of which were prepared by potentially biomimetic means, against a panel of four human-cancer cell lines reveals significant variations in activity as a function of structure.
3-oxethyl-4-[1-(4,5-dibromopyrrole-2-yl)-formamido]-butanoic acidmethylester (4), 2-oxethyl-3-[1-(4,5-dibromopyrrole-2-yl)-formamido]-methyl propionate (5), and 9-oxethyl-mukanadin F (6), along with two known metabolites, hanishin (7) and longamide B methylester (8), were isolated from the South China Sea sponge Agelas sp. The racemic mixtures 1–5, 7 and 8 were resolved into seven pairs of enantiomers 1a/1b–5a/5b