ABSTRACT Allylicoxidation of 2-phospholenes gave the first successful preparation of 4-oxo-2-phospholene 1-oxide derivatives, and this synthetic approach provides a ready accessible route in the synthesis of a wide variety of pentofuranose analogs of phospha sugars, having a phosphorus atom as the sugar ring hetero atom.
and facile chemo- and regioselectiveoxidation of the allylic methylene group in a 2-phospholene ring system afforded the novel carbonyl derivatives of 2-phospholenes (2a–i). The method gives high conversion and selectivity in the formation of allylic ketones. The advantages of this oxidation method in such a five-membered pseudo sugar2-phospholene ring are mentioned, and the oxidation is examined