Dimethylformamide → 3-Phenylbenzaldehyde

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To a solution of 1-bromo-3-phenylbenzene (Aldrich) (0.0858 moles) in 300 mL of dry THF cooled to −78° C. was added tert-butyl lithium (2 eq.) (1.7M in hexane) dropwise. The reaction mixture was stirred for 40 min. at −78° C. and then quenched with 2 eq. of DMF (13.24 mL). The resulting mixture was stirred for 20 min. and then poured into a separatory funnel and extracted with CH2Cl2. The organic extracts were washed with water, dried over Na2SO4, filtered and concentrated to give a brown oil. This oil was purified by LC 2000 chromatography, eluting with ethyl acetate/hexanes (5:95) to give 3-biphenylcarboxaldehyde.

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