Adcock found that the reaction of pyridine with 1,3-diiodo-BCP formed a substituted BCP pyridinium salt (Scheme 2A) and Wiberg found that C-I bond heterolysis of 1-iodo-BCPs in the presence of NaN3 yielded a BCB observed by NMR spectroscopy (Scheme 2B). Given the growing commercial availability of BCPs, we wondered if we could expand upon Wiberg's observation and develop a more general intermolecular reaction between iodo-BCPs and nucleophiles to make substituted BCBs.