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Isolation and synthesis of 4-bromopyrrole-2-carboxyarginine and 4-bromopyrrole-2-carboxy-N(epsilon)-lysine from the marine sponge Stylissa caribica.

Research paper by Achim A Grube, Ellen E Lichte, Matthias M Köck

Indexed on: 31 Jan '06Published on: 31 Jan '06Published in: Journal of Natural Products



Abstract

Two new bromopyrrole alkaloids were isolated from the Caribbean sponge Stylissa caribica. The new natural products, 4-bromopyrrole-2-carboxyarginine (1) and 4-bromopyrrole-2-carboxy-N(epsilon)-lysine (2), are derivatives of amino acids linked with a 4-bromopyrrole-2-carboxylic acid. The structures were elucidated on the basis of NMR and MS/MS data and their absolute configurations assigned via synthesis.