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Carbon dioxide is an intrinsically stable molecule. Therefore, its activation requires extra energy input in the form of reactive reagents and/or activated catalysts and, often, harsh reaction conditions. Reported here is a direct carboxylation reaction of aromatic aldehydes with carbon dioxide to afford α‐keto acids as added‐value products. In situ generation of a reactive cyanohydrin was the key...
Der Cinchona‐Sulfonamid‐Organokatalysator 1 vermittelt die hoch enantioselektive biomimetische Aldolreaktion von Malonsäure‐Halbthioestern mit vielfältigen Aldehyden unter Bildung von optisch aktiven β‐Hydroxythioestern. Das Verfahren bewährte sich in Formalsynthesen der Antidepressiva (R)‐Fluoxetin, (R)‐Tomoxetin, (−)‐Paroxetin und (R)‐Duloxetin.
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