Abstract

Abstract Transition-metal free reactions of diazo compounds with organoboron compounds provide some unique approaches for the formation of C–C, C–B and C–Si bonds. With N-tosylhydrazones as the precursors for non-stabilized diazo compound, this type of reaction becomes practically useful in organic synthesis. Transition-metal-free synthetic methodologies for borylation, gem-diborylation, gem-silylborylation arylation, 2,2,2-trifluoroethylation and gem-difluorovinylation have been successfully developed.

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