This step can sometimes be tricky to perform, but it can nevertheless be a very useful way to make interesting amines. The choice of solvent seems to play a very important role here as does the addition of acid to protonate the liberated amine, thereby preventing it to poison the catalyst.
Patent US6218575 (http://l2.espacenet.com/dips/viewer?PN=US6218575&CY=gb&LG=en&DB=EPD)