| http://www.w3.org/ns/prov#value | - The reaction is usually performed in an anhydrous, inert organic solvent, for example an ether, such as diethyl ether, 1,2-dimethoxyethane, 1,2-diethoxyethane or, especially, tetrahydrofuran, the reaction generally being carried out in an inert gas atmosphere, at a temperature of from ???80 to 25??? C. In a next step, the monoanion formed is reacted with the compound of formula (3), that reaction
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