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Describe the following giving chemical e...

Describe the following giving chemical equations :
(i) De-carboxylation reaction.
(ii) Friedel-Crafts reaction
(b) How will you bring about the following conversions ?
(i) Benzoic acid to Benzaldehyde
(ii) Benzene to m-Nitroacetophenone
(iii) Ethanol to 3-Hydroxybutanal.

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a(ii) set - I , delhi board -2012
(b) (i) Benzoic acid to Benzaldehyde

(ii) Benzene to m-Nitroaceptophenone

(iii) Ethanol to 3- Hydroxybutanal
`underset("Ethanol")(CH_3CH_2OH)overset("Reductions")underset(Cu)to CH_3CHO+NaOHtoCH_3 -underset("3-Hydroxybutanal")undersetunderset(OH)(|)CH-CH_2CHO`
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