A method of preparing optically active isocoumarin-3-yl-acetic acid derivatives represented by Formula (I):
1
wherein a specific isocoumarin-ketene derivative is subjected to an addition reaction with an optically active alcohol, and then the ester thus obtained is subjected to a hydrolysis reaction. An intermediate for synthesis used therein. A method of preparing isocoumarin-3-yl-acetic acid derivatives represented by Formula (III):
2
wherein a specific isocoumarin derivative is subjected to an addition reaction with carbon monoxide and oxygen in the presence of a transition metal catalyst. An intermediate for synthesis used therein.
一种制备由式(I)代表的具有光学活性的异
香豆素-3-基
乙酸衍
生物的方法:
1
其中,特定的异
香豆素-酮衍
生物与光学活性醇发生加成反应,然后将得到的酯进行
水解反应。其中使用的合成中间体。一种制备由式(III)代表的异
香豆素-3-基
乙酸衍
生物的方法:
2
其中特定的异
香豆素衍
生物在过渡
金属催化剂存在下与
一氧化碳和
氧气发生加成反应。其中使用的合成中间体。