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in Aldehydes, Ketones and Carboxylic Acids by (26.1k points)
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1. Reimer – Tiemann reaction

2. Rosenmund Reduction

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1. Reimer – Tiemman reaction: When phenol is heated with CHCI3 at 340 K, o-hydroxy benzaldehyde or salicylaldehyde is obtained.

2. Rosenmund reduction: When an acid chloride is reduced by using hydrogen gas in presence of Pd and BaSO4, an aldehyde is obtained.

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