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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Solution

(i) Ethanal into Butane- $1, 3$ -diol
Aldol condensation (in presence of dil NaOH) followed by reduction with sodium borohydride.
(ii) Ethanal into But- $2$ -enal
Aldol condensation (in presence of dil NaOH) followed by dehydration.
(iii) Ethanal into But- $2$ -enoic acid
Aldol condensation (in presence of dil NaOH) followed by dehydration and oxidation with Tollen's reagent.

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How will you convert ethanal into the following compounds ?

Butane - 1, 3 - diol

But - 2 - enal

But - 2 - enoic acid

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