Triethylamine → (3-{[(3,5-Dimethyl-isoxazole-4-sulfonyl)-(4-pyrimidin-2-yl-benzyl)-amino]-methyl}-phenoxy)-acetic acid tert-butyl ester

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Reaction Steps

To a solution of {3-[(4-pyrimidin-2-yl-benzylamino)-methyl]-phenoxy}-acetic acid tert-butyl ester (83.3 mg, 0.2054 mmol), prepared in Step A of Example 130, in CH2Cl2 was added triethylamine (0.94 mL, 0.68 mmol) and 3,5-dimethyl-isoxazole-4-sulfonyl chloride (44.2 mg, 0.226 mmol) and the reaction was heated at reflux overnight. After cooling to room temperature, additional triethylamine (0.94 mL) and 3,5-dimethyl-isoxazole-4-sulfonyl chloride (44 mg) was added. The reaction was heated at reflux for 72 h and was cooled to room temperature. The organic solution was washed sequentially with 5.5% aqueous HCl, water, saturated sodium bicarbonate solution, and brine. The organic solution was dried (MgSO4), filtered, and concentrated. Flash chromatography (CHCl3:MeOH 99:1) provided the title compound of Step A (61 mg). MS 565 (M+1).

Provenance & Evidence