[reaction: see text] Furanomycin is a Streptomyces metabolite that substitutes for isoleucine in protein translation. We report a concise and modular synthesis starting from the Garner aldehyde and proceeding in seven steps to furanomycin. The key steps include a stereoselective acetylide addition and the Ag+-mediated cyclization of an alpha-allenic alcohol to construct the trans-2,5-dihydrofuran. The efficiency (12% overall yield) and flexibility of the route will provide ample quantities of furanomycin and analogues for protein engineering.
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VanBrunt et al. (2000) studied this question.
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