| http://www.w3.org/ns/prov#value | - The reaction is carried out in a suitable inert solvent such as dimethylformamide, methanol, ethanol, propanol, butanol, tetrahydrofuran, benzene, toluene or acetonitrile in the presence of a suitable base (e.g. sodium methoxide, sodium ethoxide, potassium t-butoxide, sodium hydride, potassium hydride, sodium hydroxide, potassium hydroxide, potassium carbonate, sodium carbonate) at --20??? C. to 1
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