prov:value
| - The base that is used in the present invention is one or more selected from among inorganic salts, such as sodium carbonate, potassium carbonate, cesium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium hydroxide or potassium hydroxide, and organic salts, such as triethylamine, DBU, DABCO, DMAP or Proton Sponge, and the solvent usable in the present invention is acetonitri
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