Difficult
Give the conversion of the following:
$(i)$ Lactic acid from ethanal
$(ii)$ $p-$fluorobenzaldehyde from $p-$fluorotoluene
$(i)$ Lactic acid from ethanal
$(ii)$ $p-$fluorobenzaldehyde from $p-$fluorotoluene
(N/A) $(i)$ Conversion of ethanal to lactic acid:
$CH_3CHO + HCN$ $\rightarrow CH_3CH(OH)CN$ $\xrightarrow{H_3O^+} CH_3CH(OH)COOH$ (Lactic acid)
$(ii)$ Conversion of $p-$fluorotoluene to $p-$fluorobenzaldehyde:
$p-F-C_6H_4-CH_3$ $\xrightarrow[273-278 \ K]{CrO_3, (CH_3CO)_2O} p-F-C_6H_4-CH(OCOCH_3)_2$ $\xrightarrow{H_3O^+} p-F-C_6H_4-CHO$ ($p-$fluorobenzaldehyde)
$CH_3CHO + HCN$ $\rightarrow CH_3CH(OH)CN$ $\xrightarrow{H_3O^+} CH_3CH(OH)COOH$ (Lactic acid)
$(ii)$ Conversion of $p-$fluorotoluene to $p-$fluorobenzaldehyde:
$p-F-C_6H_4-CH_3$ $\xrightarrow[273-278 \ K]{CrO_3, (CH_3CO)_2O} p-F-C_6H_4-CH(OCOCH_3)_2$ $\xrightarrow{H_3O^+} p-F-C_6H_4-CHO$ ($p-$fluorobenzaldehyde)
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