76177-53-2

Upstream product

• 91-16-7 1,2-dimethoxybenzene 
• 1131-62-0 1-(3,4-dimethoxyphenyl)ethanone 
• 163428-90-8 2,2-dihydroxy-1-(3,4-dimethoxyphenyl)ethan-1-one 
• 67170-61-0 5-(3,4-dimethoxyphenyl)pyrazine-2,3-dicarbonitrile 
• 15462-03-0 3',4'-dimethoxyphenylglyoxal 

Relevant academic research and scientific papers

The Photochemistry of the Host-Guest Complex. VII. The Photoreaction of Dicyanopyrazine Derivatives Having a Crown Ether Moiety

The irradiation of 4'-(5,6-dicyano-2-pyrazinyl)benzo-15-crown-5 and 5,6-dicyano-2-(3,4-dimethoxyphenyl)pyrazine in the presence of a tertiary or secondary amine caused reductive decyanation to give 5-decyano derivatives, which in turn gave bis(decyano) derivatives on further irradiation.Free-energy changes upon single-electron transfer from the amine to the excited state of dicyanopyrazine derivatives are exothermic for triethylamine and diethylamine, but endothermic for butylamine.The single-electron transfer was evidenced by the effect of the sodium ion on the quantum yields of the reaction products and the fluorescence quenching.

EFFECT OF GUEST CATION ON THE PHOTOREACTIVITY OF THE PYRAZINE DERIVATIVES HAVING CROWN ETHER MOIETY

Irradiation of the acetonitrile solution of 4'-(5,6-dicyanopyrazin-2-yl)benzo-15-crown-5 (1) or 4-(5,6-dicyanopyrazin-2-yl)-1,2-dimethoxybenzene (2) in the presence of triethylamine gave monodecyano-derivative (3 or 4) and bisdecyano-derivative (5 or 6).S