Pd(II)-catalyzed intramolecular C–H activation/C–C cross coupling for the synthesis of carbazoles from diaryl acetamides
摘要:
Pd(II)-catalyzed intramolecular C-H activation/C-C cross coupling within N,N-diphenyl-acetamides allows the efficient formation of differently substituted carbazoles. In this cross-dehydrogenative coupling, many different functional groups are tolerated and the starting material N,N-diphenyl-acetamides can be easily prepared in one step from commercially available acetanilides and iodobenzenes. (C) 2011 Elsevier Ltd. All rights reserved.
The N-arylation of aromatic and aliphatic secondary acyclic amides, known to be poor nucleophiles, has been accomplished using a simple and cheap copper catalytic system. The corresponding tertiary acyclic amides, which can be found in numerous biologically active compounds, have been obtained in good to excellent yields.
Combined KOH/BEt<sub>3</sub> Catalyst for Selective Deaminative Hydroboration of Aromatic Carboxamides for Construction of Luminophores
作者:Wubing Yao、Jiali Wang、Aiguo Zhong、Jinshan Li、Jianguo Yang
DOI:10.1021/acs.orglett.0c03033
日期:2020.10.16
amides into value-added amine products is a desirable but challenging transformation. Molecules containing iminodibenzyl motifs are prevalent in pharmaceutical molecules and functional materials. Here we established a combined KOH/BEt3 catalyst for deaminative hydroboration of acyl-iminodibenzyl derivatives, including nonheterocyclic carboxamides, to the corresponding amines. This novel transition-metal-free
酰胺选择性催化C–N键裂解为增值胺产品是一种理想的但具有挑战性的转化。含有亚氨基二苄基基序的分子普遍存在于药物分子和功能材料中。在这里,我们建立了一种组合的KOH / BEt 3催化剂,用于将酰基-亚氨基二苄基衍生物(包括非杂环羧酰胺)进行脱氨基硼氢化成相应的胺。这种新颖的无过渡金属的方法也被用于氯米帕明和发光体的构建。
Copper-Catalyzed Amidation of Aryl Iodides in the Presence of Various Chelating Ligands
-Dibenzylethylenediamine is presented as a new, efficient, and versatile bidentateligand suitable for the copper catalyzed formation of the C-N bond. This bidentateligand has been demonstrated to facilitate the copper catalyzed cross-coupling reactions of aryl iodides with amides to afford the desired products in good to excellent yields.
coupling of aryliodides with aliphatic alcohols and phenols that does not require the use of alkoxide bases is described. This C-O bond forming procedure shows that the combination of air stable Cul and 1,10-phenanthroline in the presence of KF/Al 2 O 3 comprises an extremely efficient and general catalyst system for the etherification of aryliodides. Different functionalized aryliodides were coupled
描述了一种不需要使用醇盐碱将芳基碘与脂肪醇和酚偶联的简单有效的方法。这种 CO 键形成过程表明,在 KF/Al 2 O 3 存在下,空气稳定的 Cul 和 1,10-菲咯啉的组合包含用于芳基碘醚化的极其有效和通用的催化剂体系。使用这种方法将不同的官能化芳基碘与醇和酚偶联。
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。