4 fluoronitrobenzene

2-fluoronitrobenzene (“2-FNB”) (99%), 3-fluoronitrobenzene (“3-FNB”) (99%), and 4-fluoronitrobenzene (“4-FNB”) (98%) were purchased from Oakwood Chemical (Estill, SC, USA). Imidazole (99%) was purchased from Aldrich (St. Louis, MO, USA). Potassium carbonate (99%, anhydrous) and Pd/C (10% on C, Type 487) were purchased from BeanTown Chemical (Hudson, NH, USA). α,α’-Dichloro-p-xylene. (pDCXy, >98%), α,α’-Dichloro-m-xylene. (mDCXy, >96%), and α,α’-Dichloro-o-xylene (oDCXy, >97%) were purchased from TCI (Tokyo Chemical Industry) (Portland, OR, USA). Lithium bis-trifluoromethanesulfonimide (HQ-115) was purchased from 3M (Minneapolis, MN, USA). Ethanol (EtOH, 200 proof), N-methylpyrrolidone (NMP, ACS grade), dimethyl sulfoxide (DMSO, ACS grade), diethyl ether (Et₂O) and toluene (anhydrous) were purchased from VWR (Atlanta, GA, USA). Acetic anhydride (Ac₂O, >99%) was purchased from Alfa Aesar (Tewksbury, MA, USA). SiO₂ (Celite 545) was purchased from Acros Organics. (Geel, Belgium) 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) was purchased from Akron Polymer Systems (Akron, OH, USA). All materials were used as obtained, without further purification.