2,4,6-Trimethylpyriliumperchlorate (940-93-2) 's Synthetic route

Carbonylation of methyl acetate in the presence of polymeric rhodium-containing catalysts

Kolesnichenko, N. V.  Batov, A. E.  Markova, N. A.  Slivinsky, E. V.

New catalytic systems based on RhCL3 and polymeric nitrogen- and oxygen-containing supports were proposed for the carbonylation of methyl acetate to acetic anhydride. The catalytic systems possess a high activity typical of homogeneous catalysts. The high activity is retained upon the repeated use of the catalyst separated from the reaction products. The nitrogen-containing polymers of the chitosan type serve as cocatalysts. In their presence, the induction period disappears, and the catalytically active species are stabilized, thus enabling the replacement of expensive LiI for cheaper salts of this metal.

Mono- and Polyanhydride Formation by Reaction of 2,2,4,4,6,6-Hexachlorotriazaphosphorine with Carboxylic Acids under Mild Conditions

Gregorio, Francesco Di  Marconi, Walter  Caglioti, Luciano