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Write the reaction of Williamson synthesis of 2-ethoxy-3-methylpentane starting from ethanol and 3-methylpentan-2-ol. |
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Answer» Solution :For WILLIAMSON synthesis, the alkyl halide should be primary (unhindcred or least HINDERED). Thus, the alkyl halide should be DERIVED from ethanol and the alkoxide ion from 3-methylpentan-2-ol. The complete synthesis is as follows : `underset("Ethanol")(CH_(3)CH_(2)OH)+HBr OVERSET(Delta)rarr underset("Bromoethane")(CH_(3)CH_(2)Br)+H_(2)O` `underset("3-Methylpentan-2-ol")(2overset(5)CH_(3)overset(4)CH_(2)-overset("3")underset(CH_(3))underset("|")"CH"-underset(CH_(3))underset("1|")overset("2")"CH"-OH+Na)rarr2CH_(3)CH_(2)-underset(CH_(3))underset("|")"CH"-underset(CH_(3))underset("|")"CH"-O^(-)Na^(+)+H_(2)` 
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