Nitrogen → 3',4',5'-Trimethoxy-biphenyl-2-carbonyl chloride

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Reaction Steps

(The following reaction is done in an anhydrous N2 atmosphere.) Dissolve 3′,4′,5′-Trimethoxy-biphenyl-2-carboxylic acid (56) (54 mg, 0.18 mmol) in anhydrous DCM (1.3 mL) and add anhydrous DMF (1 drop, cat. amount). Then add slowly oxalyl chloride (21 μL, 0.24 mmol) by keeping temperature at ca. 20° C. with a water bath and stir the turbid mixture for additional 2 h at rt. Remove solvent and dry in vacuum to obtain crude 3′,4′,5′-Trimethoxy-biphenyl-2-carbonyl chloride (57) as a yellow solid. No further purification.

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