Question

Give a detailed account of the Lederer-Manasse Reaction

Answer 1

Synthesis of phenol-formaldehyde resins by polycondensation of phenols in excess amounts of formaldehyde

Answer 2

Lederer-Manasse Reaction

Explanation:

• The mechanism through which phenol is converted into para and ortho hydroxy benzyl alcohol it is called a Lederer-Manasse reaction.
• In this reaction, the reactants involved, products formed and catalyst used as follows:

Reactants:

Phenol

Formaldehyde or methanal

Products:

Para hydroxy benzyl alcohol

Ortho hydroxy benzyl alcohol

Catalyst and time:

Acid or alkali for Six days

• When phenol is treated with methanal in the presence of acid or base as catalyst for six days, the methanal attacks the ortho and para position of the phenol.
• Due to this, the compounds called Para hydroxy benzyl alcohol and Ortho hydroxy benzyl alcohol are formed.
• This reaction is also called a Hydroxy methylation of phenol and is a very slow process.
• The mechanism involved in the reaction is given in the attachment.

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