Triethylamine → methyl 4-chloro-5-(1-methyl-1H-indol-5-yl)-2-({[3-(methyloxy)phenyl]acetyl}amino)benzoate

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Reaction Steps

To a suspension of methyl 2-amino-4-chloro-5-(1-methyl-1H-indol-5-yl)benzoate (Intermediate 45) (150 mg, 0.427 mmol) in dichloromethane (20 mL) at 0° C. was added triethylamine (0.131 mL, 0.940 mmol) and [3-(methyloxy)phenyl]acetyl chloride (Acros Organics, 79 mg, 0.427 mmol) was added dropwise. The reaction mixture was stirred from 0° C. to RT for 1 h before being quenched with 1N HCl. The organic layer was separated and washed successively with sat. NaHCO3 and brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The product was purified by chromatography using a cyclohexane to cyclohexane/EtOAc 80:20 as eluant. The appropriate fractions were combined and concentrated in vacuo to give the title compound methyl 4-chloro-5-(1-methyl-1H-indol-5-yl)-2-({[3-(methyloxy)phenyl]acetyl}amino)benzoate (150 mg, 0.324 mmol, 76% yield) as a white amorphous solid. LCMS: (M+H)+=463; Rt=4.23 min.

Provenance & Evidence