Synthesis and Exchange Reactions of 1,4,8,11-Tetraazacyclotetradeca-7(E),14(E)-diene-5,12-diones
摘要:
A number of functionalized, unsaturated 5,12-dioxo cyclams were synthesized by acid-catalyzed dimerization of appropriately functionalized azapenams. Although easily isolated and purified, these unsaturated tetraaza macrocycles underwent acid-catalyzed exchange reactions of the monomer unit to give mixed systems. Even a simple dihydrobenzazepine participated in this exchange process to give a ''hybrid'' macrocycle.