Add time:08/31/2019         Source:sciencedirect.com

A short synthesis of the marine sponge alkaloids dibromophakellstatin (1) and dibromoisophakellin (2) is described. The synthesis of 1 centers on a putative biomimetic oxidative cyclization of imidazolone 5. Thermal rearrangement of dibromophakellin (9) in the presence of K2CO3 afforded dibromoisophakellin (2).

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