RESUMEN
Three reaction paths, namely, molecule-induced homolytic, free radical, and electrophilic, were modeled computationally at the MP2 level of ab initio theory and studied experimentally for the reaction of F2 with the terminal dienes of bicyclo[3.3.1]nonane series. The addition of fluorine is accompanied by transannular cyclization to the adamantane derivatives in which strong evidence for the electrophilic mechanism both in nucleophilic (acetonitrile) and non-nucleophilic (CFCl3 , CHCl3 ) solvents were found. The presence of KF in CFCl3 and CHCl3 facilitates the addition and substantially reduces the formation of tar products.
RESUMEN
The synthesis of SF5- and CF3-substituted benzenes and naphthalenes from various 7-oxanorbornene derivatives utilizing SF5Cl and CF3I radical addition reactions, followed by dehydrohalogenation and aromatization, is reported. The differences in the behavior of the SF5- and CF3-containing intermediates under basic and acidic conditions are discussed. The experimentally observed high regioselectivities of the formation of 2-RF-substituted-1-naphthols agree well with the ab initio computations, revealing the first example of the SF5···HO hydrogen bonding.