Methyl 2-chloroacetoacetate → Methyl 4-methyl-2-phenyl-1,3-thiazole-5-carboxylate

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Reaction Steps

A solution of methyl 2-chloroacetoacetate (1.86 g, 12.4 mmol) and thiobenzamide (1.7 g, 12.4 mmol) in EtOH (50 mL) was refluxed for 18 h. The mixture was evaporated to dryness and the resulting oil was purified by flash chromatography to give methyl 4-methyl-2-phenylthiazole-5-carboxylate (1.21 g, 42%) as a colourless oil: 1H NMR (300 MHz, CDCl3) δ (TMS) 8.0-7.9 (m, 2H, arom), 7.5-7.4 (m, 3H, arom), 3.87 (s, 3H, OMe), 2.76 (s, 3H, Me-thiazole). Analysis calculated for C12H11NO2S: C 61.78; H 4.75; N 6.00; S 13.74. Found: C 61.56; H 4.71; N 5.82; S 14.61.

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