Abstract
AbstractTreatment of the acyl chlorides (Ia), (Ib) or of the alkyl chloroformates (Ic) with equivalent amounts of 20% NaOH under the conditions of liquid‐liquid phase‐transfer catalysis affords the corresponding carboxylic anhydrides (IIa), (IIb) or carbonic acid anhydrides (IIc) in high yields.
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