介绍了一种通过逐步钌催化的 C-H 芳基化和钾介导的还原性环化脱氢从 2-苯基吡啶和芳基溴化物合成二苯并 [f, h] 喹啉及其衍生物的方法。一种二苯并[ f , h ] 喹啉衍生物被用作双齿配体来制备环金属化的钌络合物。通过单晶 X 射线结构分析表征了两种二苯并 [ f , h ] 喹啉化合物和钌络合物。
Palladium(II)-Catalyzed ortho Arylation of 2-Phenylpyridines with Potassium Aryltrifluoroborates by C-H Functionalization
作者:Ming-Jung Wu、Jean-Ho Chu、Shiang-Lin Tsai
DOI:10.1055/s-0029-1217014
日期:2009.11
4-dioxane at 120 ˚C for 24 hours. p-Benzoquinone is an important co-oxidant in the transmetalation-reductive elimination step. The kinetic isotope effect (k H/k D) for the C-H bond activation was determined to be 1.09. It indicates that the C-H bond cleavage does not occur in the rate-determining step. C-H functionalization - potassium trifluoroborate - palladium catalyst - arylations - pyridines
提出了通过使用芳基三氟硼酸钾有效地一锅合成邻芳基化的2-苯基吡啶和吡啶衍生物。最佳反应条件如下:在10摩尔%的乙酸钯(II),三当量的乙酸铜(II)和两当量的乙酸铜存在下,用2.5当量的芳基三氟硼酸钾处理2-苯基吡啶或吡啶衍生物。对苯醌在1,4-二恶烷中的溶液在120°C下保持24小时。对苯醌是在金属转移-还原消除步骤中的重要助氧化剂。动力学同位素效应(k H / k D对于CH键的活化确定为1.09。这表明在速率确定步骤中没有发生CH键断裂。 CH官能化-三氟硼酸钾-钯催化剂-芳基化-吡啶
Palladium-Catalyzed Decarboxylative Arylation of C−H Bonds by Aryl Acylperoxides
作者:Wing-Yiu Yu、Wing Nga Sit、Zhongyuan Zhou、Albert S.-C. Chan
DOI:10.1021/ol900756g
日期:2009.8.6
bond was developed using aryl acylperoxides as inexpensive aryl sources. Substrates containing pyridyl, oxime, and oxazoline groups undergo effectively ortho-selective C−H arylation with excellent functional group tolerance. This arylation should begin by directing-group-assisted cyclopalladation, followed by the reaction of the palladacycle with aryl radicals generated in situ by thermal decomposition
We describe a method for intramolecular desulfonylative coupling using bis(cyclooctadiene)nickel as a catalyst. A broad range of aromatic, heteroaromatic and aliphatic sulfones can be utilized as substrates in this process. This method provides an atom‐economical route to the synthesis of various biaryls and an efficient tool for the catalytic conversion of sulfonyl groups, representing a significant
Synthesis of Dibenzo[f,h]quinolines by Stepwise C–H Arylation of 2-Phenylpyridine and Reductive Cyclodehydrogenation
作者:Yu-Wu Zhong、Yan-Qin He、Zhong-Qiu Li
DOI:10.1055/a-2069-4269
日期:2023.9
A syntheticapproach to dibenzo[f,h]quinolines and their derivatives via stepwise ruthenium-catalyzed C–H arylation and potassium-mediated reductive cyclodehydrogenation from 2-phenylpyridine and aryl bromides, is presented. One dibenzo[f,h]quinoline derivative is used as a bidentate ligand to prepare a cyclometalated ruthenium complex. Two dibenzo[f,h]quinoline compounds and the ruthenium complex
介绍了一种通过逐步钌催化的 C-H 芳基化和钾介导的还原性环化脱氢从 2-苯基吡啶和芳基溴化物合成二苯并 [f, h] 喹啉及其衍生物的方法。一种二苯并[ f , h ] 喹啉衍生物被用作双齿配体来制备环金属化的钌络合物。通过单晶 X 射线结构分析表征了两种二苯并 [ f , h ] 喹啉化合物和钌络合物。