Pyridinium chlorochromate poly

The work-up of PCC oxidations can be greatly facilitated by the use of the PCC polymeric derivative, poly[vinyl(pyridinium chlorochromate)].228 Filtration of the polymer and concentration of the organic solution allow an easy isolation of the product. 

Because the reagent is slightly acidic, it cannot be used to oxidize acid-sensitive compounds [605. For easier isolation of the products, the complex may be formed in the presence of alumina. After the reagent is stirred with the alcohol at room temperature for 2 h, the aldehyde is isolated by filtration and evaporation of the filtrate [604. Another solid-support oxidant of pyridinium chlorochromate is prepared by treatment of cross-linked poly(vinylpyridine) with chromium trioxide and hydrochloric acid (equation 212) [612]. 

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