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ChemicalBook CAS DataBase List 4,4'-Dibromobiphenyl
92-86-4

4,4'-Dibromobiphenyl synthesis

15synthesis methods
-

Yield:92-86-4 97%

Reaction Conditions:

with Cu2(ophen)2 in N,N-dimethyl-formamide at 20; for 20 h;

Steps:

4.3. Catalytic tests: general procedure I for the Cu2(ophen)2catalyzed homocoupling for Table 2

General procedure: 4.3. Catalytic tests: general procedure I for the Cu2(ophen)2catalyzed homocoupling for Table 2 A solution of the corresponding arylboronic acids (1.0 mmol),Cu2(ophen)2 (1.3 mg, 0.5 mol %), DMF (1.0 mL) in 5 mL round-bottomed ask was stirred under air and the reaction was moni-tored by TLC. After the substrate was consumed, the reaction con-versions were determined bygas chromatography (GC) analysis (FIDfrom AGILENT 7820) using a cross-linked (95%)-dimethyl-(5%)-diphenylpolysil-oxane column (HP-5, 30 m0.32 mm0.25 mm),helium, injector temperature 250 C, detector temperature 300 C,and oven temperature program 45 C (3 min)e20C/mine280 C(2 min). The resulting mixture was poured into brine (10 mL), andextracted with diethyl ether (310 mL). The organic layer waswashed with brine, dried over Mg2SO4, the residue was chromato-graphed via a short column of silica gel (petroleum ether: diethylether15:1) and evaporated under reduced pressure. The productswas determined by 1H NMR spectroscopy. All 1H NMR spectra weremeasured in CDCl3 with TMS as the internal standard.

References:

Wang, Yan-Hong;Xu, Mei-Chen;Liu, Jie;Zhang, Ling-Juan;Zhang, Xian-Ming [Tetrahedron,2015,vol. 71,# 52,p. 9598 - 9601]

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