反应详情

Following the procedure as described in Example 3, making variations as required to replace ethyl 2-amino-4-methylthiazole-5-carboxylate with methyl 2-aminothiazole-5-carboxylate to react with 2-chloroethyl isocyanate, the title compound was obtained as a colorless solid in 44% yield: mp 205-208° C. (ethyl acetate/hexanes); 1H NMR (300 MHz, CDCl3) δ 8.02 (s, 1H), 5.55 (s, 1H), 4.25-4.19 (m, 2H), 3.84 (s, 3H), 3.72-3.67 (m, 2H); 13C NMR (75 MHz, CDCl3) δ 162.8, 162.5, 157.0, 145.1, 122.2, 52.1, 44.4, 38.1; MS (ES+) m/z 228.2 (M+1).