Benzil – Benzilic Acid Rearrangement
(a) Prep. of benzil by oxidation of benzoin by nitric acid
(b) Benzil, an ® , ¯ - diketone undergoes rearrangement to benzilic acid.

Fisher: Indole Synthesis: Preparation of 1.2.3.4 – tetrahydrocarbazole. This compound is prepared according to the Fisher indole synthesis starting from phenylhydrazine and cyclohexanone.

Diazotization: Forming a diazonium salt from an appropriate primary aromatic amine in the presence of HNO2.

Preparation of P - Iodonitrobenzene: By Irradiation with Sunlight OR By Reductive Coupling Prep. of Benzopinacol from benzophenone by reductive coupling

MOLECULAR REARRANGEMENT

Pinacol – Pinacolone – rearrangement

(a) Prep. of benzopinacol
(b) Prep. of benzopinacolone

REIMER – TIEMANN REACTION Prep. of β-hydroxynapthaldehyde from β-napthal
Prep. of β-hydroxynapthaldehyde from β-napthal

PERKIN REACTION
Preparation of Cinnamic acid
Bromination cinnamic acid i.e. Prep. of bromostryrene

ALDOL CONDENSATION AND EPOXIDATION
(a) Preparation of Chalcone
(b) Preparation of Chalcone epoxide