OK, the Appel was quite successful, thanks for advices.
I have one more question: the purpose of 1,6-dibromohexane is to make thiepane from it, according to the work from:
Mandolini, Vontor, Synthetic Communications, 9 (9), 857-861 (1979). (I didn't find any better procedure to prepare thiepane.)
In that work, the autors state that there were "three tested solvents, namely dimethylformamide, dimethylsulfoxide, and hexamethylphosphoramide, of which the last was by far the most effective". Since we don't have the latter in the lab, I'm considering switching it With something else but I really don't know which other polar aprotic solvent to use, especially after they wrote that DMF and DMSO were not effective.
Can you suggest some better way to get thiepane on 1-5 gram scale? Preferably from acyclic precursors, since we don't have any thiepane derivatives in the lab. (buying is excluded unfortunately)