I suppose you could heat it in neat pyrrolidine to be sure there is no over-alkylation. Reductive amination is good idea to try as well. The best is IMO, to look into chemical literature because Im sure someone else did that already. And because Im a nice guy that has cofee break atm, I did some search for you. Reductive amination seems like a way to go
reductive amination
Synthetic Communications, 2009, vol. 39, # 16, p. 2907 - 2916
cyclohexyl amine + dibromo butane under microwave conditions
Journal of Organic Chemistry, 2006, vol. 71, # 1, p. 135 - 141