Oxidation of alkynes, both terminal and internal, is performed by hydrogen peroxide in the presence of catalytic amounts of (cetylpyridinium)3PM12O40 (M = Mo(VI), W(VI)). A comparison with the analogous oxidation reactions catalyzed by Na2MO4 reveals that PM12O40 3- anions are more efficient catalysts than MO4 2- in the oxidation of terminal alkynes to carboxylic acids. The higher catalytic activity of peroxometalates allows the oxidation of internal alkynes by hydrogen peroxide, which does not occur with MO4 2- salts.
Oxidation of alkynes, both terminal and internal, is performed by hydrogen peroxide in the presence of catalytic amounts of (cetylpyridinium)3PM1204(M = Mo(VI), W(VI)). A comparison with the analogous oxidation reactions catalyzed by Na2MO4 reveals that PM120403- anions are more efficient catalysts than M042- in the oxidation of terminal alkynes to carboxylic acids. The higher catalytic activity of peroxometalates allows the oxidation of internal alkynes by hydrogen peroxide, which does not occur with M042- salts.
OXIDATION OF ALKYNES CATALYZED BY MO(VI) AND W(VI) POLYOXOMETALATES
BALLISTRERI, Francesco Paolo;FAILLA, Salvatore;TOMASELLI, Gaetano
1989-01-01
Abstract
Oxidation of alkynes, both terminal and internal, is performed by hydrogen peroxide in the presence of catalytic amounts of (cetylpyridinium)3PM12O40 (M = Mo(VI), W(VI)). A comparison with the analogous oxidation reactions catalyzed by Na2MO4 reveals that PM12O40 3- anions are more efficient catalysts than MO4 2- in the oxidation of terminal alkynes to carboxylic acids. The higher catalytic activity of peroxometalates allows the oxidation of internal alkynes by hydrogen peroxide, which does not occur with MO4 2- salts.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.