21759-69-3
β-N-methylaminocapronic acid methyl ester
+
42521-08-4
2,6-二氯吡啶-4-羰酰氯
→
~77%
82140-55-4
2-[(2,6-二氯-4-吡啶)羰基]-3-(甲基氨基)-2-丁烯酸甲酯
105-45-3
乙酰乙酸甲酯