Cobalt-Catalyzed CH Arylations with Weakly-Coordinating Amides and Tetrazoles: Expedient Route to Angiotensin-II-Receptor Blockers
作者:Jie Li、Lutz Ackermann
DOI:10.1002/chem.201500552
日期:2015.4.7
Cobalt‐catalyzed CH arylations enabled the synthesis of biaryl tetrazoles, which are key structural motifs in antihypertensive angiotensin‐II‐receptor blockers. Thus, weakly‐coordinating benzamides were employed for step‐economical CH arylations with ample scope. Further, a low‐valent NHC complex enabled first cobalt‐catalyzed CH functionalization by tetrazole assistance.
钴催化的CH芳基化能够合成联芳基四唑,这是降压血管紧张素II受体阻滞剂中的关键结构基序。因此,弱配位的苯甲酰胺被用于步长经济的CH芳基化,具有足够的范围。此外,低价的NHC配合物可通过四唑的辅助作用首先使钴催化CH官能化。