| dc.description.abstract | The chemistry of simple phosphole derivatives is
comprehensively reviewed to the early part of 1970.
Using 1,2,5-triphenylphosphole and some of its
derivatives as starting materials, several ring expansion
and related reactions of the phosphole system have been i
studied. Thus, pyrolysis and photolysis of 3,4,5-
triphenyl-4-phosphabicyclo [3.1.0] hex-2-ene-4-oxide and
certain pyrazolino derivatives of 1,2,5-triphenylphosphole
oxide lead to the formation of compounds of
formula (see document for formula). These
compounds are shown to be derivatives of the 4,4’-
diphosphabi (cyclohexa-1,5-dienyl) and 4,4'-diphosphabi-
(cyclohexa-2,5-dienylidene) systems respectively and
possible mechanisms for the formation of these compounds
are discussed. Furthermore, the first of these compounds
may be converted into the second in an unusual reaction
in which lithium aluminium hydride acts as an oxidizing
agent.
The alkaline hydrolysis of 1-iodomethyl-l,2,5-
triphenylphospholium iodide is discussed as a possible
route to unsymmetrically substituted phosphorins. | |
