91Ó°ÊÓ

(a)1-phenylethanol on treating with sodium hydride (NaH) then sodium 1-phenylethanolate is formed which on further react with CH₃Br to give desired product as shown below:

Preparation of Methyl 1-phenylethyl

(b) 1-phenylethanol on reacting with ${\mathrm{POCl}}_3$in the presence of a catalyst pyridine gives styrene which on further react with ${\mathrm{RCO}}_3\mathrm{H}$to form the desire product as shown below:

Preparation of Phenylepoxyethane

During alkoxymercuration reaction, an alkenes reaction with suitable mercury salt and an alcohol occurs. The reagent used in the reaction is NaBH₄ (sodium borohydride) which will undergo a reductive demercuration and yield corresponding ethers.

(c)1-phenylethanol on treatment with alkoxymercuration –demercuration reaction gives tert-Butyl 1-phenylethyl ether as the desired product as shown below:

Preparation of tert-Butyl 1-phenylethyl ether

(d) 1-phenylethanol on treating with ${\mathrm{PBr}}_{3,}$gives 1-bromoethylbenzene which on further react with thiourea in the presence of water to give desired product as shown below in the figure:

Preparation of 1-Phenylethanethiol