Dokl. Akad. Nauk SSSR, 1957 Volume 114, Number 5,Pages 1025–1028(Mi dan22066)
CHEMISTRY
The action of inogranic acid chlorides on arylsulphonic acids. A general method for the production of anhydrides
from a reaction of arylsulphonic acids with $\mathrm{P}_2\mathrm{O}_5$