methyl 4-oxo-3-(pyridin-2-ylcarbonyl)pentanoate 、
ethyl 5-hydrazinyl-1,3-thiazole-4-carboxylate 在
dichloromethane hydrate 、
Sodium sulfate-III 作用下,
以
甲醇 为溶剂,
反应 2.0h,
以Chromatography of the residue gave 0.508 g of product (61.8% of theory), NMR (CDCl3, 300 MHz): 1.12 (t, 3H); 2.35 (s, 3H); 3.66 (s, 2H); 3.69 (s, 3H); 4.08 (s, 3H); 7.19 (m, 1H); 7.32 (m, 1H); 7.66 (m, 1H); 8.51 (m, 1H); 8.72 (s, 1H)的产率得到ethyl 5-[4-(2-methoxy-2-oxoethyl)-3-methyl-5-(pyridin-2-yl)-1H-pyrazol-1-yl]-1,3-thiazole-4-carboxylate