SNAr azidation of phenolic functions utilizing diphenyl phosphorazidate
A useful method for the synthesis of aryl azides via SNAr reaction of phenol derivatives using diphenyl phosphorazidate (DPPA) as an azidation reagent was developed. Various phenol derivatives bearing electron-withdrawing groups were converted into the corresponding aryl azides in a single step. This method is easy to perform and enables the preparation of aryl azides without the use of explosive azide sources.
Models for intramolecular exchange in organic π-conjugated open-shell systems. A comparison of 1,1-ethenediyl and carbonyl linked bis(arylnitrenes)
Linkage of two phenylnitrene electron-spin-bearing units by exchange coupling linker groups leads to model open-shell π-conjugated systems of the general structure :N-Ph-X-Ph-N: of various possible connectivity types. Use of variable-temperature electron
Ling, Chris,Minato, Masaki,Lahti, Paul M.,Van Willigen, Hans
p. 9959 - 9969
(2007/10/02)
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