ADDITION AND CYCLOADDITION REACTIONS OF FUROPYRROLES AND THEIR BENZO ANALOGUES: AN NMR STUDY OF STRUCTURE OF PRODUCTS
Reaction of furopyrroles and their benzo analogues with dimethyl butynedioate and ethyl propynoate were investigated.The reaction course is influenced by substituents on the system.Products of cycloaddition to the furan or pyrrole nucleus as well as products of Michael addition to the benzofuropyrrole system have been found.The structure of the products has been proven by 1H NMR and 13C NMR spectroscopy.