We have developed a high-efficiency and practical Cu-catalyzed cross-coupling to directly construct versatile α-aryl-esters by utilizing readily available aryl bromides (or chlorides) and malonates. These gram-scale approaches occur with turnovers of up to 1560 and are smoothly conducted by the usage of a low catalyst loading, a new available ligand, and a green solvent. A variety of functional groups
Copper-Catalyzed Coupling Reaction of (Hetero)Aryl Chlorides and Amides
作者:Subhadip De、Junli Yin、Dawei Ma
DOI:10.1021/acs.orglett.7b02326
日期:2017.9.15
amide is established to be an effective catalyst system for Goldberg amidation with inferior reactive (hetero)aryl chlorides, which have not been efficiently documented by Cu-catalysis to date. The reaction is well liberalized toward a variety of functionalized (hetero)aryl chlorides and a wide range of aromatic and aliphatic primary amides in good to excellent yields. Furthermore, the arylation of
Cu 2 O / N,N'-双(噻吩-2-基甲基)草酰胺被确立为用较差的反应性(杂)芳基氯化物进行戈德堡酰胺化的有效催化剂体系,迄今为止,Cu催化还没有有效地证明这一点。 。反应很好地放宽了对各种官能化的(杂)芳基氯化物以及各种芳族和脂族伯酰胺的反应,收率非常好。此外,实现了内酰胺和恶唑烷酮的芳基化。本催化体系还完成了分子内的交叉偶联产物。
Room Temperature Cu-Catalyzed <i>N</i>-Arylation of Oxazolidinones and Amides with (Hetero)Aryl Iodides
作者:Subhajit Bhunia、Subhadip De、Dawei Ma
DOI:10.1021/acs.orglett.2c00122
日期:2022.2.11
an apposite promoter for the Cu-catalyzed N-arylation of oxazolidinones and primary and secondary amides with (hetero)aryliodides at room temperature. Excellent chemoselectivity reached between aryliodides and arylbromides, and a wide range of functional groups tolerated the reaction conditions, which led to the formation of greatly diverse N-arylation products.
N , N '-Bis(pyridin-2-ylmethyl)oxalamide (BPMO) 被发现是 Cu 催化的恶唑烷酮和伯胺和仲胺在室温下与(杂)芳基碘化物的N-芳基化的合适促进剂。芳基碘化物和芳基溴化物之间达到了优异的化学选择性,并且广泛的官能团可以耐受反应条件,从而导致形成多种多样的N-芳基化产物。
Cu‐Catalyzed Coupling Reactions of Sulfonamides with (Hetero)Aryl Chlorides/Bromides
作者:Qiaoli Li、Lanting Xu、Dawei Ma
DOI:10.1002/anie.202210483
日期:2022.10.24
of (hetero)aryl halides proceeds with excellent reaction scope by using oxalamides or 4-hydroxypicolinamides as the ligands. For bromides, only 2–5 mol % CuI and oxalamides were required. For chlorides, increasing catalytic loadings to 10 mol % Cu2O and ligands was needed. Direct sulfonamidation of four chloro-containing marketed drugs and preparation of two sulfonamide drugs were achieved under these
通过使用草酰胺或 4-羟基吡啶甲酰胺作为配体,Cu 催化的(杂)芳基卤化物磺酰胺化反应具有出色的反应范围。对于溴化物,仅需要 2–5 mol% CuI 和草酰胺。对于氯化物,需要将催化负载增加到 10 mol% Cu 2 O 和配体。在此条件下实现了四种含氯市售药物的直接磺酰胺化和两种磺胺类药物的制备。
Cu2O-Catalyzed Ullmann-type C N cross-coupling reaction of carbazole and aryl chlorides
A copper-catalyzed Ullmann-type CN cross-coupling reaction of carbazole with aryl chlorides has been developed employing N,N′-bis(thiophene-2-ylmethyl)oxalamide as ligand. The reaction proceeds at 140 °C with Cs2CO3 as the base in DMSO/MeCN to afford N-arylcarbazole in good to excellent yields. Both the heteroaromatic ring and amide structures in ligands are important for their efficiency.
以N , N'-双(噻吩-2-基甲基)草酰胺为配体,开发了咔唑与芳基氯化物的铜催化乌尔曼型CN交叉偶联反应。该反应在 140 °C 下以 Cs 2 CO 3作为碱在 DMSO/MeCN 中进行,以良好至优异的收率得到N-芳基咔唑。配体中的杂芳环和酰胺结构对其效率都很重要。