Bis(4-chlorophenyl)methane → 1,1'-(4-Chlorobutane-1,1-diyl)bis(4-chlorobenzene)

A solution of 4,4′-dichlorodiphenylmethane (4.37 g, 18.4 mmol) (Blackwell, J. et all, J. Chem. Soc., 1961, 1405) in dry tetrahydrofuran (50 ml) was treated at 0° C. with butyllithium (12.1 ml of 1.6 M, 19.36 mmol) added dropwise over 15 min. After 15 min, the red solution was then added dropwise to a cold (−78° C.) solution of 1-chloro-3-iodopropane (15.0 g, 73.4 mmol) in dry tetrahydrofuran (120 ml). After 20 min at −78° C., the reaction mixture was quenched by the addition of saturated ammonium chloride (100 ml) and diluted with toluene. The organic phase was washed with brine and dried. The oil obtained after evaporation of the solvent was purified on silica gel (elution hexane-toluene 85:15) and distilled under vacuum to give 2.54 g (44%) of the title material as a clear oil: bp 110-130° C./1.5 torr (air bath temperature).

1. additionadded dropwise over 15 min
2. waitAfter 20 min at −78° C.
3. customthe reaction mixture was quenched by the addition of saturated ammonium chloride (100 ml)
4. additiondiluted with toluene
5. washThe organic phase was washed with brine
6. customdried
7. customThe oil obtained
8. customafter evaporation of the solvent
9. customwas purified on silica gel (elution hexane-toluene 85:15)
10. distillationdistilled under vacuum

ORD record

ord-915f95be55014c9b9941c1e7c7c11d0b

Source dataset

uspto-grants-2001_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06255496B1