Show how D-leucine can be synthesized from the L-enantiomer of leucic acid

Synthesis pathway from L-leucic acid to D-leucine using HCl and reagents.

Synthesis pathway from L-leucic acid to D-leucine using TsCl and ammonia.

Another synthesis pathway from L-leucic acid to D-leucine using TsCl and ammonia.

Alternative synthesis pathway from L-leucic acid to D-leucine using HCl and reagents.