Stannyl-Lithium: A Facile and Efficient Synthesis Facilitating Further Applications
摘要:
We have developed a highly efficient, practical, polycyclic aromatic hydrocarbon (PAH-catalyzed synthesis of stannyl lithium (Sn-Li), in which the tin resource (stannyl chloride or distannyl) is rapidly and quantitatively transformed into Sn-Li reagent at room temperature without formation of any (toxic) byproducts. The resulting Sn-Li reagent can be stored at ambient temperature for months and shows high reactivity toward various substrates, with quantitative atom efficiency.
heteroaryl, alkyl, or benzylic polyfunctional zinc reagents obtained by the addition of zinc and LiCl to the corresponding organic iodides undergo smooth Pd(0)-catalyzed cross-coupling reactions with aryl bromides, chlorides, and triflates in the presence of PEPPSI as a catalyst. This procedure avoids the manipulation of water and air-sensitive organozincreagents and produces cross-coupling products in high
Efficient Diphosphane-Based Catalyst for the Palladium-Catalyzed Suzuki Cross-Coupling Reaction of 3-Pyridylboronic Acids
作者:Xing-Li Fu、Lei-Lei Wu、Hai-Yan Fu、Hua Chen、Rui-Xiang Li
DOI:10.1002/ejoc.200900038
日期:2009.5
4′-bis(diphenylphosphanyl)-3,3′-bipyridine (P-Phos) has been developed for the Suzukicross-coupling reaction of pyridylboronic acid with a variety of aryl halides in good to excellent yields, even in the presence of hindered and functional groups. In addition, P-Phos also exhibited high activity in the palladium-catalyzedSuzuki reaction of 2,6-dimethoxypyridylboronic acid in excellent yields with a fast
We report the synthesis of 2-(anthracen-9-yl)-1H-inden-3-yl dicyclohexylphosphine and its use in palladium-catalyzed borylation/Suzuki-Miyauracross-coupling reaction to prepare a variety of symmetrical and unsymmetrical biaryl compounds in excellent yield.
Pincer-type bis(carbene)-derived complexes of nickel(II): Synthesis, structure, and catalytic activity
作者:Kiyofumi Inamoto、Jun-ichi Kuroda、Eunsang Kwon、Kou Hiroya、Takayuki Doi
DOI:10.1016/j.jorganchem.2008.11.003
日期:2009.2
Air- and moisture-stable NHC (N-heterocyclic carbene)-derived CNC-type pincer complexes of nickel(II) 4a–d were successfully synthesized, and their structures were fully characterized using X-ray crystallography and analytical and spectroscopic methods. These complexes exhibit a high catalytic activity for the Suzuki–Miyaura coupling reaction of arylbromides and chlorides with aryl- and alkenylboronic
The Suzuki cross-coupling reaction of 3-pyridylboronic pinacol ester with aryl iodides, bromides and chlorides was carried out in DMF/H2O (3/1, v/v) at 110 °C in the presence of cyclopalladatedferrocenylimine I and K2CO3 or CsCO3 (1.0 equiv.) without the protection of inert gas. By using this method the synthesis of 3-pyridyl biaryl compounds could be readily achieved.
3-吡啶基硼酸频哪醇酯与芳基碘化物,溴化物和氯化物的Suzuki交叉偶联反应是在DMF / H 2 O(3/1,v / v)中于110℃下在环钯酸二茂铁亚胺I和K的存在下进行的2 CO 3或CsCO 3(1.0当量),无惰性气体保护。通过使用该方法,可以容易地实现3-吡啶基联芳基化合物的合成。