Highly efficient palladium-catalyzed cross-coupling of diarylborinic acids with arenediazoniums for practical diaryl synthesis
作者:Fengze Wang、Chen Wang、Guoping Sun、Gang Zou
DOI:10.1016/j.tetlet.2019.151491
日期:2020.2
A highly efficient cross-coupling of cost-effective diarylborinic acids with both isolatable and latent arenediazoniums, i.e. tetrafluoroborates and aryltriazenes, respectively, has been developed with a practical palladium catalyst system under base-free conditions in open flask at room temperature. A variety of electronically and sterically various biaryls, in particular, those bearing a coordinative
Base-assisted, copper-catalyzed N-arylation of (benz)imidazoles and amines with diarylborinic acids
作者:Changwei Guan、Yuanyuan Feng、Gang Zou、Jie Tang
DOI:10.1016/j.tet.2017.10.043
日期:2017.12
cost-effective aryl source has been efficiently effected via Cu(OAc)2-catalyzed Chan-Lam coupling in assistance of tetramethylethylenediamine (TMEDA) in methanol and pyridine (Py) in dichloromethane, respectively, in air at room temperature. The diarylborinic acids could be well accommodated by the Chan-Lam coupling oxidative conditions containing a proper combination of bases and solvents. The steric
The catalytic cross-coupling reaction of potassium diaryldifluoroborates with aryl halides proceeds to afford the biphenyls in good yields. These salts on an arylation reagent were readily prepared via a protocol of the Grignard method and transformation to potassium salts. Two aryl groups of these salts were efficiently transferred in the Suzuki-Miyaura reaction.
Highly efficient synthesis of aryl ketones by PEPPSI-palladium catalyzed acylative Suzuki coupling of amides with diarylborinic acids
作者:Chen Wang、Lingyun Huang、Fengze Wang、Gang Zou
DOI:10.1016/j.tetlet.2018.05.003
日期:2018.6
An improved acylative cross-coupling of various N-methyl-N-tosyl amides with diarylborinic acids for synthesis of aryl ketones is developed. In most cases, aryl ketones could be obtained in excellent yields by using 1 mol% 2,6-diisopropylphenylimidazolylidene and 3-chloropyridine co-supported palladium chloride as catalyst in the presence of 3 equiv. K2CO3 as base in refluxing THF. The readily prepared
已开发了用于合成芳基酮的各种N-甲基-N-甲苯磺酰基酰胺与二芳基硼酸的改进的酰基交叉偶联。在大多数情况下,在3当量的存在下,通过使用1mol%的2,6-二异丙基苯基咪唑基亚甲基和3-氯吡啶共负载的氯化钯作为催化剂,可以以优异的产率获得芳基酮。在回流的THF中,以K 2 CO 3为碱。容易制备且具有成本效益的底物,N-甲基-N-甲苯磺酰胺和二芳基硼酸,以及可商购的催化剂体系,保证了实用和有效地获得芳基酮。