Figure 1: Activation modes in carbene organic catalysis. | Nature Communications

Figure 1: Activation modes in carbene organic catalysis.

From: A reaction mode of carbene-catalysed aryl aldehyde activation and induced phenol OH functionalization

Figure 1

(a) Previous studies mainly dealt with carbon atom activation for acyclic non-aromatic carbonyl compounds. (b) Our earlier studies realized indole-type heteroaryl aldehyde benzylic carbon activation. (c) Addition of carbene catalyst eventually leads to simple phenyl aldehyde activation which induces phenol oxygen atom functionalization via a new azolium-bound intermediate (II).

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