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Question
Which one of the following do not give Birch reduction?
Which one of the following do not give Birch reduction?
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Solution
The correct option is D (a) and (b) above.
Terminal alkyne does not show Birch reduction due to the acidic nature of terminal Hydrogen, it reacts with Na/liq.NH3 to liberate H2.
Since But-1-yne and Hex-1-yne are terminal alkyne hence they donot undergoes birch reduction.
CH3−CH2−CH≡CHNa/liqNH3⟶CH3−CH2−C≡C−Na++12H2
Hex-2-yne will undergoes birch reduction and gives trans alkene as a major product.
Terminal alkyne does not show Birch reduction due to the acidic nature of terminal Hydrogen, it reacts with Na/liq.NH3 to liberate H2.
Since But-1-yne and Hex-1-yne are terminal alkyne hence they donot undergoes birch reduction.
CH3−CH2−CH≡CHNa/liqNH3⟶CH3−CH2−C≡C−Na++12H2
Hex-2-yne will undergoes birch reduction and gives trans alkene as a major product.
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