. Explain the preparation of Ethers by the action of diazomethane on alcohols
By the action of diazomethane on alcohols - Methyl ethers can also be prepared by action of CH2N2 on alcohols in presence of fluoroboric acid (HBF4) as catalyst.
Williamson's synthesis: It is the most important method for formation of ethers. It is a nucleophilic substitution reaction. Nucleophile (SN2) attack by alkoxide ion on an alkyl halide/alkyl sulphate / alkyl sulphonato which are known as substrates.
i. Substrates must have a primary alkyl group for good yield.
ii. In case of tertiary substrate elimination occurs giving alkenes
iii. With a secondary alkyl halide, both elimination and substitution products are obtained.