反应详情

This compound was prepared in the manner of Example 6, with 18.28 grams (0.0415 mole—1.0 equiv.) of 1-(4-chloro-2-fluoro-5-iodophenyl)-4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazole, 6.28 grams (0.0436 mole—1.05 equiv.) of ethyl 3-hydroxy-2-methylenebutanoate, 15.4 grams (0.083 mole—2.0 equiv.) of tributylamine, and 0.233 gram (0.0010 mole—0.025 equiv.) of palladium(II) acetate as reagents. A yield of 20.3 grams of 75.6% pure ethyl α-acetyl-2-chloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1yl]4-fluorobenzenepropanoate (87.9% yield) was obtained.