Question

# In which of the following reaction cyanide will be obtained as a major product?

A
PhO||CCH3(i)LiAlH4(ii)H3O+
B
PhO||CNH2NaOHBr2
C
PhO||CNH2P4O10
D
PhO||COHSOCl2NH3

Solution

## The correct option is B $$Ph-\overset{O}{\overset{||}{C}}-NH_2\overset{P_4O_{10}}{\rightarrow}$$$$\Rightarrow$$ In general,an alkyl or aryl amide reacts with $${ P }_{ 4 }{ O }_{ 10 }$$ to give the corresponding Nitrile/cyanide.$$\Rightarrow$$ Here, Benzamide would give benzo-nitrite.$${ P }_{ 4 }{ O }_{ 10 }$$ acts as a dehydrating agent .Chemistry

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