Triethylamine → 5-(N-(3-((N-(Biphenyl-4-ylmethyl)-3,5-dichloro-2-hydroxyphenylsulfonamido)methyl)benzyl)sulfamoyl)-2-methylbenzoic acid

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To a solution of N-(3-(aminomethyl)benzyl)-N-(biphenyl-4-ylmethyl)-3,5-dichloro-2-hydroxybenzenesulfonamide (50 mg, 0.095 mmol) and Et3N (0.13 mL) in CH2Cl2 (4 mL) was added a solid of 5-(chlorosulfonyl)-2-methylbenzoic acid (22.24 mg, 0.095 mmol) at rt and it was stirred at it for 70 min. Direct purification of the mixture after concentration by prep HPLC provided the desired product (40 mg, 58.1%) as a white solid after lyophilization. 1H NMR (CD3OD): δ 8.17 (d, J=2.0 Hz, 1H), 7.93 (dd, J=8.3, 2.2 Hz, 1H), 7.56˜6.90 (m, 15H), 6.76 (s, 1H), 4.34 (s, 2H), 4.31 (s, 2H), 3.87 (s, 2H), 2.52 (s, 3H); MS (ESI): (M+H)+=725.

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