The known blood platelet reducing agent Anagrelide is prepared via an improved process starting with commercially available 2,3-dichlorotoluene and involving novel intermediates represented by the formulas:
wherein Y is Br, Cl or I.
Compound (G) is reacted with ethyl glycine to form the well-known intermediate ethyl-N-(2,3-dichloro-6-nitro benzyl) glycine which is then used following conventional process steps to form Anagrelide.
已知的血小板减少剂 Anagrelide 是通过一种改进的工艺制备的,该工艺以市场上可买到的
2,3-二氯甲苯为起点,并涉及由以下公式表示的新型中间体:
其中 Y 为 Br、Cl 或 I。
化合物 (G) 与甘
氨酸
乙酯反应生成众所周知的中间体乙基-N-(2,3-二
氯-6-硝基苄基)甘
氨酸,然后按照常规工艺步骤使用该中间体生成 Anagrelide。