2,6-Dichlorobenzothiazole → 2-(2-{4'-[(6-Chloro-1,3-benzothiazol-2-yl)amino]-1,1'-biphenyl-4-yl}-2-oxoethyl)pentanoic acid

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This compound was prepared from methyl 2-[2-(4′-amino-1,1′-biphenyl-4-yl)-2-oxoethyl]-pentanoate (68 mg, 0.20 mmol) and 2,6-dichloro-1,3-benzothiazole (61.3 mg, 0.30 mmol) in a similar manner to the method described for 4-[4′-(1,3-benzothiazol-2-ylamino)-1,1′-biphenyl-4-yl]-2,2-dimethyl-4-oxobutanoic acid, providing 17.2 mg (18%) of the desired product. 1H NMR (400 MHz, DMSO-d6) δ 12.10 (br s, 1H), 10.75 (br s, 1H), 7.75-8.05 (m, 9H), 7.60 (d, 1H), 7.35 (m, 1H), 3.40 (q, 1H), 3.10 (m, 1H), 1.55 (m, 2H), 1.35 (m, 2H), 0.85 (t, 3H). LC-MS m/z 479.3 (MH+), ret. time 3.88 min.

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