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How will you convert ethanal into the following compounds? (i) Butane-1,3-diol, (ii) But-2-enal (iii) But-2-enoic acid. |
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Answer» SOLUTION :(i) `UNDERSET("Ethanal")(2CH_(3)CHO) underset(("Aldol condensation")) overset("Dil. NaOH")to underset("3-Hydroxybutanal")(overset(4)(C)H_(3)-overset(3)(C)HOH-overset(2)(C)H_(2)-overset(1)(C)HO underset(("Reduction")) overset(NaBH_(4))to underset("Butane-1,3-diol")(overset(4)(C)H_(3)-overset(3)(C)HOH-overset(2)(C)H_(2)overset(1)(C)H_(2)OH` (II) `underset("Ethanal")(2CH_(3)CHO) underset(("Aldol condensation")) overset("Dil. NaOH")to underset("3-Hydroxybutanal")(overset(4)(C)H_(3)- overset(3)(C)HOH-overset(2)(C)H_(2)-overset(1)(C)HO underset(-H_(2)O)overset(H_(3)O^(+)//Delta)to underset("But-2-enal")(CH_(3)-CH=CH-CHO)` (iii). `underset("Ethanal")(CH_(3)CHO) underset("Above") overset("As in (ii)")to underset("But-2-enal")(CH_(3)CH=CHCHO) underset("Tollens' reagent")overset([Ag(NH_(3))_(2)]^(+)OH^(-))to underset("But-2-enoic acid")(CH_(3)CH=CHCO_(2)H)` |
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