2-甲酯基噻吩-3-重氮四氟硼酸盐的钯催化的松田-的Heck和Suzuki-Miyaura交叉偶联1进行到合成一系列在β位官能噻吩衍生物。使用乙酸钯[Pd(OAc)2 ],一种无配体的钯催化剂,无碱,在室温下,好氧条件下,反应时间短的情况下,可获得良好或优异的交叉偶联产物收率。重氮化和交叉偶联的序列也可以在一锅法中进行,从而避免了噻吩并重氮盐衍生物的分离。此外,2-甲氧基羰基苯并[ b ]噻吩-3-重氮四氟硼酸盐8 通过应用相同的Suzuki-Miyaura优化反应条件也可以有效地芳基化。
Regioselective C–H Alkenylation and Unsymmetrical Bis-olefination of Heteroarene Carboxylic Acids with Ruthenium Catalysis in Water
作者:Anup Mandal、Ratnadeep Bera、Mahiuddin Baidya
DOI:10.1021/acs.joc.0c02215
日期:2021.1.1
accommodates a large variety of heteroaromatic carboxylicacids as well as olefins, and facilitates a diverse array of high-value olefin-tethered heteroarenes in high yields (up to 87%). The potential of this ortho-C–H bond activation strategy has also been exploited toward tunable synthesis of densely functionalized heteroarenes through challenging unsymmetrical bis-olefination process in a one-pot sequential