Abstract Bicyclic B-alky-N-pyrrolylboranes (1–3) react with alkyl lithium or alkyl Grignard reagents to give the corresponding borates 5 which, in most cases can be protonated to the intramolecular 2 H-pyrrole-borane adducts 4. The molecular structure of 4d was determined by X-Ray structural analysis. The adducts 4 can be deprotonated to the borates 5. Cleavage of the BN bond in 1a by EtOH to give 7a is reversible, and 1e react with CF 3 SO 3 H by ...
