Abstract
We describe the first general transition-metal-free synthesis of gem-diboromethyl-substituted bicyclo[1.1.1]pentane (BCP) and other related C(sp3)-rich carbocyclic benzene bioisosteres from their corresponding p-tosylhydrazones. These novel functionalized benzene bioisosteres demonstrated unique reactivities toward palladium-catalyzed C(sp2)-C(sp3) cross couplings. The overall transformation can be applied to relatively complex substrates with potential utility in drug discovery.
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