Question

Reagent (s) which can be used to bring about the following transformation is (are)

A. `LiAIH_(4)` in `(C_(2)H_(5))_(2)O`
B. `BH_(3)` in THF
C. `NaBH_(4)` in `C_(2)H_(5)OH`
D. Raney `Ni//H_(2)` in THF

Answer 1

`LiAIH_(4)` in `(C_(2)H_(5))_(2)O: BH_(3)` in (THF) : Raney `Ni(H_(2))` either can reduce all functional group or can reduce some of the functional group of the compound given above in reactant side.
But `NaBH_(4)` is example of selective reducing agent. it can not reduce `-underset(O)underset(||)C-O-` (ester group), `-underset(O)underset(||)C-OH` (carboxylic acid group_, (epoxide group), but reduces `-CH=O` (Aldehyde group) into `-CH_(2)OH(1^(@(` alcohol)