Question

Write the following reactions:
1. Gattermann Reaction.
2. Reimer-Tiemann reaction
3. Duff reaction

Answer 1

Answer:

The Gattermann reaction, is a chemical reaction in which aromatic compounds are formylated by a mixture of hydrogen cyanide and hydrogen chloride in the presence of a Lewis acid catalyst such as AlCl₃. It is named for the German chemist Ludwig Gattermann and is similar to the Friedel–Crafts reaction

The Reimer–Tiemann reaction is a chemical reaction used for the ortho-formylation of phenols; with the simplest example being the conversion of phenol to salicylaldehyde. The reaction was discovered by Karl Reimer and Ferdinand Tiemann. The Reimer in question was Karl Reimer not the less known Carl Ludwig Reimer.

The Duff reaction or hexamine aromatic formylation is a formylation reaction used in organic chemistry for the synthesis of benzaldehydes with hexamine as the formyl carbon source. ... The reaction requires strongly electron donating substituents on the aromatic ring such as in a phenol.