| http://www.w3.org/ns/prov#value | - The reaction can be carried out in an organic solvent such as for example benzene, toluene, tetrahydrofuran, dioxan or ethyl acetate at a temperature comprised between about 20??? and about 100??? C. Preferably, phosphoric acid in dioxan tetrahydrofuran is used and the reaction is carried out at the boiling temperature of said solvents.
|
