Solar and ultraviolet N-dealkylation of N,N-diemthylaminobenzylidene malonic acid derivatives via photoexcited polycyclic nitrioaromatic compounds

摘要

Broadband irradiation of N,N-dimethylaminobenzylidene malonic acid derivatives in benzene solution with polycyclic nitroaromatic compunds,namely 1-nitronaphthalene,9-nitroanthracene and 1-nitropyrene leads to mono-alkylated products predominant,accompanied by the corresponding photoreduction products of the nitroaromatics,lower conversion was obsewrved in acetonitrile concomitant with 2-4% of the mono-alkylated products,however,no conversion was observed in methanol as solvent.The structures of the products were assigned based on IR,~1H-,~(13)C NMR and mass spectra,elemental analyses and comparison with authentic samples.