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The Reaction of Vanillin with Grignard Reagents: Mechanisms and Experimental Considerations

"The reaction of vanillin (4-hydroxy-3-methoxybenzaldehyde) with Grignard reagents involves the nucleophilic addition of an organomagnesium halide to the carbonyl group, typically necessitating the protection of the phenolic hydroxyl group. Without protection, the Grignard reagent acts as a base, deprotonating the phenol before adding to the aldehyde, leading to diminished yields and the requirement for multiple equivalents of the reagent. Chemical Profile of Vanillin and Grignard Reagents Vanillin is a phenolic aldehyde commonly used as a starting material in organic synthesis due to its accessibility and structural complexity. It contains th..."

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