| 摘要 |
There is provided a compound of formula III, and a process for preparing a compound of formula V comprising converting a compound of formula III to the compound V, wherein X is fluoro, chloro, bromo or iodo. There is also provided a process for preparing a compound of formula XI comprising converting a compound of formula X to the compound XI. The compounds V and XI so prepared may be used in a process for preparing gefitinib. |
