| http://www.w3.org/ns/prov#value | - The reaction solvent can be methylene chloride, tetrahydrofurane, dioxane, water, dimethylformamide or dimethylsulfoxide and the presence of an acid binding agent such as sodium, potassium or cesium carbonate, sodium hydroxide, triethylamine, potassium t-butoxide, sodium hydride is required.
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