Which of the reagents listed below would efficiently accomplish the transformation of ethyl-3-pentenoate into 3-penten-1-ol?

a. i) lialh4; ii) h2o

b. nabh4, h2o

c. h2, pd

d. two of these choices.

e. all of these choices?

Reactions of Ethyl-3-pentenoate with all given reagents are given below.

Reaction with H₂ / Pd:

The non-polar double bond present in Ethyl-3-pentenoate is reduced to saturated chain. This reagent can not reduce the carbonyl group.

Reaction with NaBH₄:

Sodium Borohydride is a weak reducing agent at compared to LiAlH₄. It can only reduce aldehydes and Ketones to corresponding alcohols.

Reaction with LiAlH₄:

Lithium Aluminium hydride is a strong reducing agent. It can reduce all types of carbonyl compounds to corresponding alcohols, But, it can not reduce non-polar double bonds like alkenes and alkynes.

Result:

The correct answer is Option-A (Highlighted RED below).