A new, twelve-step approach towards the mero_x0002_terpenoid cochlearol B is reported. This strategy takes advantage ofa palladium-catalyzed Catellani reaction of a complex chromenyl triflate and a subsequent visible light-mediated [2+2]-cycloaddition to form the central bicyclo[3.2.0]heptane core of cochlearol B. No_x0002_tably, careful selection and tuning of the photocycloaddition pre_x0002_cursor proved crucial to differentiate between cyclopropanation re_x0002_actions, [4+2] cycloadditions, and selective [2+2]-photocycloaddi_x0002_tions. Price of 5-Fluoro-1H-1,2,4-triazole Formula of (-)-Fucose PMID:23074147
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