Ethylamine → 2-[(E)-2-(3-Butyl-5-methyl-isoxazol-4-yl)-vinyl]-4-methyl-thiazole-5-carboxylic acid ethylamide

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As described for example 104, 2-[(E)-2-(3-butyl-5-methyl-isoxazol-4-yl)-vinyl]-4-methyl-thiazole-5-carboxylic acid (153 mg, 0.5 mmol) was converted, using ethylamine (2M solution in THF) instead of rac-2-amino-1-butanol, to the title compound (91 mg, 55%) which was obtained as a light yellow solid after purification by chromatography (silica, 0 to 100% ethyl acetate in heptane). MS: m/e=334.2 [M+H]+.

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