Suggest at least 4 ways to obtain butanol-2 Write the corresponding reaction equations

Let’s write the equations:
1. Н3С – СНCl – CH2 – CH3 + KOH = H3C – CH – OH – CH2 – CH3 + KCl – the exchange reaction occurs with the participation of 2-chlorobutane and alkali;
2. Н3С – СН = СН – СН3 + Н2О = Н3С – СН – ОН – СН2 – СН3 – hydration of butene-2, occurs in water vapor, catalyst is copper;
3. Н3С – С (О) – СН2 – СН3 + Н2 = Н3С – СН (ОН) – СН2 – СН3 – hydrogenation reaction, occurs with heating and the participation of a catalyst;
4. Н3С – СН2 – СН – (СН3) – О – СО – СН3 + Н2О = Н3С – СН2 – СН – (ОН) – СН3 + СН3СООН – ester hydrolysis occurs in the presence of sulfuric acid.
Butanol-2 is a secondary alcohol used in the production of synthetic rubber.