Palladium-Catalyzed Regioselective Direct Arylation of Benzofurazans at the C-4 Position
作者:Imane Idris、Fazia Derridj、Jean-François Soulé、Henri Doucet
DOI:10.1002/adsc.201700435
日期:2017.7.17
The palladium‐catalyzed direct arylation of benzofurazans with aryl bromides to access 4‐arylbenzofurazans proceeds in moderate‐to‐high yields using phosphine‐free palladium acetate as the catalyst and potassium acetate as an inexpensive base. A wide variety of (hetero)aryl bromides, including bromopyridine and bromothiophene derivatives has been successfully employed. Palladium‐catalyzed one‐pot C‐4
使用无膦的
乙酸钯作为催化剂,
乙酸钾作为廉价的碱,
钯催化的
苯并呋喃酮与芳基
溴的直接芳基化反应可制得4-芳基
苯并呋喃。已经成功地使用了各种各样的(杂)芳基
溴化物,包括
溴吡啶和
溴噻吩衍
生物。使用大量的芳基
溴化物也可以实现
钯催化的一锅C-4,C-7二芳基
苯并呋喃的芳基化反应。此外,也报道了将4-芳基
苯并呋喃类衍
生物衍生为4-芳基
喹喔啉。