Convenient direct syntheses of novel fused-ring CB₄N₅ systems by nitrile hydroboration †

Abstract

Reactions between B₂H₆ or BH₃·thf (thf = tetrahydrofuran) and nitriles RC[triple bond, length half m-dash]N (R = Me, Et, Bu^t or CH₂F), previously known to generate borazines (RCH₂NBH)₃ have been found to generate also 25–37% yields of novel carboraza bicyclic systems related to dihydronaphthalene, H₃B₄N₅(RCH₂)₄CHR, thus affording for the first time a direct route from commercially available acyclic reagents into mixed carbon–boron–nitrogen heterocyclic chemistry.

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