4857-76-5Relevant articles and documents
FORMATION OF PYRYLIUM SALTS IN THE ACYLATION OF STERICALLY HINDERED QUINONES
Ukhin, L. Yu.,Dolgopolova, N. A.,Morkovnik, Z. S.,Kuz'mina, L. G.,Struchkov, Yu. T.
, p. 364 - 368 (2007/10/02)
The reaction of 3,5-di-tert-butyl-o-benzoquinone and 2,6-di-tert-butyl-p-benzoquinone with solutions of 70percent HClO4 in acetic and propionic anhydrides and with boron trifluoride etherate in acetic anhydride leads to the formation of pyrylium salts in high yields.