Nr. Graciani et al., PHOSPHOMONOESTERS AND PHOSPHODIESTERS DERIVED FROM THE PHOTOHYDROLYSIS OF 2-METHOXY-5-NITROPHENYL SUBSTITUTED PHOSPHOTRIESTERS, Tetrahedron, 51(4), 1995, pp. 1077-1086
Phosphotriesters composed of one or two 2-methoxy-5-nitrophenyl group(
s) can be quantitatively photohydrolyzed in aqueous acetonitrile to yi
eld the desired phosphodiester or phosphomonoester, respectively. Phot
ohydrolysis occurs by attack of hydroxide at both the phosphoryl phosp
horus and at the ipso-carbon in the triplet exited state of the 2-meth
oxy-5-nitrophenyl substituted phosphoesters. The photophysical studies
described within imply that this type of reaction may be syntheticall
y useful.