Regioselective Synthesis of 4- and 7-Alkoxyindoles from 2,3-Dihalophenols: Application to the Preparation of Indole Inhibitors of Phospholipase A<sub>2</sub>
作者:Roberto Sanz、M. Pilar Castroviejo、Verónica Guilarte、Antonio Pérez、Francisco J. Fañanás
DOI:10.1021/jo070643y
日期:2007.7.1
An efficient and regioselective synthesis of 4- and 7-alkoxyindoles has been developed from commercially available starting materials such as 3-halophenols and 3-chloroanisole. Directed ortho-metalation followed by two palladium-catalyzed processes, a Sonogashira coupling and a tandem amination/cyclization reaction, allows the synthesis of regiochemically pure 4- and 7-substituted indoles. This strategy
已经从市售的起始原料例如3-卤代苯酚和3-氯苯甲醚开发了4-和7-烷氧基吲哚的有效和区域选择性合成。定向原位金属化,然后进行两个钯催化的过程,Sonogashira偶联和串联胺化/环化反应,可以合成区域化学上纯的4和7取代的吲哚。该策略已成功地用于制备已知的2- [3-(2-氨基-2-氧代乙酰基)-1-苄基-2-乙基-1 H-吲哚-4-基氧基]乙酸(LY315920)磷脂酶A 2的抑制剂。