Herein, we demonstrated an efficient protocol for reductivealkylation of azides/nitro compounds via a borrowing hydrogen (BH) method. By following this protocol, selective mono- and dialkylated amines were obtained under mild and solvent-free conditions. A series of control experiments and deuterium-labeling experiments were performed to understand this catalytic process. Mechanistic studies suggested
Efficient copper-catalyzedtrifluoromethylation of aromatic iodides was achieved with TMSCF3 in the presence of trimethylborate. The Lewis acid was used to anchor the in situ generated trifluoromethyl anion and suppress its rapid decomposition. Broad applicability of the new trifluoromethylating reaction was demonstrated in the functionalization of different aromatic and heteroaromatic iodides.
Copper-catalyzed and additive free decarboxylative trifluoromethylation of aromatic and heteroaromatic iodides
作者:Martin B. Johansen、Anders T. Lindhardt
DOI:10.1039/c9ob02635e
日期:——
A copper-catalyzed decarboxylative trifluoromethylation of (hetero)aromatic iodides has been developed. Importantly, this new copper-catalyzed reaction operates in the absence of any ligands and metal additives. The protocol shows good functional group tolerance and is compatible with heteroaromatic systems. The reaction proved scalable to a 15 mmol scale with increased yield. Finally, late-stage installation
A Ligand-Free Copper-Catalyzed Decarboxylative Trifluoromethylation of Aryliodides with Sodium Trifluoroacetate Using Ag2O as a Promoter
作者:Yaming Li、Chunying Duan、Tao Chen、Huifeng Wang、Rong Zhang、Kun Jin、Xiuna Wang
DOI:10.1055/s-0030-1260930
日期:2011.7
A practical and ligand-free Cu-catalyzed decarboxylative trifluoromethylation of aryl iodides with sodium trifluoroacetate using Ag2O as a promoter was reported. A variety of trifluoromethyl-substituted aromatics are synthesized in moderate to excellent yields and with wide functional-group tolerance under relatively mild reaction conditions.
以 Ag2O 为促进剂,用三氟乙酸钠催化芳基碘化物的脱羧三氟甲基化反应是一种实用的无配体 Cu 催化反应。在相对温和的反应条件下,合成了多种三氟甲基取代的芳香族化合物,产率从中等到极佳,且官能团容限较宽。
Development of nonproprietary phosphine ligands for the Pd-catalyzed amination reaction
作者:Robert A. Singer、Michaël Doré、Janice E. Sieser、Martin A. Berliner
DOI:10.1016/j.tetlet.2006.03.132
日期:2006.5
A new family of pyrazole and bi-pyrazole phosphine ligands are reported that perforin efficiently in the Pd-catalyzed amination reaction. Of the ligands screened, ligand 1 emerged as the most compatible for couplings involving both primary and secondary amines with typical yields of 84-99%. (c) 2006 Elsevier Ltd. All rights reserved.