Devise syntheses of the following three compounds, starting in each case with any alkene that contains four carbons or fewer. You do not have to write mechanisms, although at this point it may be very helpful for you to do so.
This is the question I'm trying to tackle. I'm having a bit of trouble with the third part of it, which is the synthesis of butan-2-ol. The text solutions says that I should use but-2-ene, which I can understand but I don't quite understand why my answer is also not plausible. Can someone help me out with this?