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Use a Grignard's reagent to prepare the ...

Use a Grignard's reagent to prepare the following alcohols:
(a) 2-Phenylbutan-2-ol (b) 3-Methylpentan-3-ol
(c) 2-Methylpentan-2-ol (d) 2-Phenylpropan-2-ol
(e) 3-Methyl-1-phenylbutan-1-ol

Text Solution

Verified by Experts

(a) `CH_(3)underset("Butan-2-one")(CH_(2))overset(O)overset(||)C-CH_(3)+C_(6)H_(5)MgBrtoCH_(3)CH_(2)underset(C_(6)H_(5))underset(|)overset(OMgBr)overset(|)C-CH_(3)overset(H^(+),H_(2)O)toCH_(3)CH_(2)underset("2-Phenylbutan-2-ol")underset(C_(6)H_(5))underset(|)overset(OH)overset(|)C-CH_(3)`
(b) `CH_(3)underset("Butan-2-one")(CH_(2))overset(O)overset(||)C-CH_(3)+CH_(3)CH_(2)MgBrtoCH_(3)CH_(2)underset(CH_(3))underset(|)overset(OMgBr)overset(|)C-CH_(2)CH_(3)overset(H^(+),H_(2)O)toCH_(3)CH_(2)underset("3-Methylpentan-3-ol")underset(CH_(3))underset(|)overset(OH)overset(|)C-CH_(2)CH_(3)`
(c) `CH_(3)underset("Pentan-3-one")(CH_(2)CH_(2))overset(O)overset(||)C-CH_(3)underset((ii)H^(+),H_(2)O)overset((i)CH_(3)MgBr)toCH_(3)CH_(2)CH_(2)-underset("2-Methylpentan-2-ol")underset(CH_(3))underset(|)overset(OH)overset(|)C-CH_(3)`
(d) `CH_(3)-underset("Propanone")overset(O)overset(||)C-CH_(3)underset((ii)H^(+),H_(2)O)overset((i)C_(6)H_(5)MgBr)toCH_(3)-underset("2-Phenylpropan-2-ol")underset(CH_(3))underset(|)overset(OH)overset(|)C-C_(8)H_(5)`
(e) `CH_(3)underset("3-Methylbutan")underset(CH_(3))underset(|)(CHCH_(2)CHO)underset((ii)H^(+),H_(2)O)overset((i)C_(6)H_(5)MgBr)toCH_(3)underset("3-Methyl-1-phenylbutan-1-ol")underset(CH_(3))underset(|)(CHCH_(2))underset(OH)underset(|)(CH)-C_(6)H_(5)`
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