New oxidative systems for alcohols: molecular sieves with chromium(VI) reagents

Abstract

The oxidation of various kinds of alcohols, including carbohydrates and nucleosides, by molecular sieve–pyridinium chlorochromate and molecular sieve–pyridinium dichromate has been investigated. The catalytic properties of molecular sieves have been investigated using kinetic, stereochemical, and isotope-labelling experiments. It is postulated that specific sites on the sieves favour hydride-ion transfer.