Substitution reactions of phenylated aza-heterocycles. Part 1. Nitration of 2,5-diphenyl-1,3,4-oxadiazole: a product study using high performance liquid chromatography
作者:Alexander Blackhall、Donald L. Brydon、Anthony J. G. Sagar、David M. Smith
DOI:10.1039/p29800000773
日期:——
Contrary to a previous literature report, nitration of 2,5-diphenyl-1,3,4-oxadiazole (1) under various conditions gives a mixture of all six possible 2,5-bisnitrophenyl derivatives, which may be analysed quantitatively usinghighperformanceliquidchromatography. Nitrationusing nitric acid alone gives mainly the three isomers with p-nitrophenyl groups, i.e.(7), (9), and (10), whereas mixed acids