Nickel-Catalyzed Cross-Coupling of Chromene Acetals and Boronic Acids
作者:Thomas J. A. Graham、Abigail G. Doyle
DOI:10.1021/ol300364s
日期:2012.3.16
nes is described. Under base-free conditions, readily accessible 2-ethoxy-2H-chromenes undergo Csp3–O activation and Csp3–C bond formation in the presence of an inexpensive nickel catalyst and boronicacids. This new strategy enables broad access to 2-substituted-2H-chromenes and has been applied to the late-stage incorporation of complex molecules, including the pharmaceuticals loratidine and indomethacin
描述了一种用于合成 2-芳基-和杂芳基-2 H-色烯的模块化和高效方案。在无碱条件下,容易获得的 2-乙氧基-2 H-色烯在廉价的镍催化剂和硼酸存在下经历 C sp 3 -O 活化和 C sp 3 -C 键形成。这种新策略可以广泛使用 2-取代-2 H-色烯,并已应用于复杂分子的后期掺入,包括药物氯雷他定和吲哚美辛甲酯。
Nickel-catalyzed acetamidation and lactamization of arylboronic acids
作者:Bo Huang、Linwei Zeng、Yangyong Shen、Sunliang Cui
DOI:10.1039/c7cc07055a
日期:——
A nickel-catalyzed acetamidation and lactamization of arylboronicacids via a one-pot reaction with ynamides and N-hydroxyphthalimide is described. This protocol features with mild reaction conditions and a broad substrate scope, and has been successfully applied to late-stage functionalization of pharmaceuticals. Moreover, control reactions were conducted to elucidate a plausible mechanism.
Nickel-Catalyzed Reductive Cross-Coupling of Aryl Halides with Monofluoroalkyl Halides for Late-Stage Monofluoroalkylation
作者:Jie Sheng、Hui-Qi Ni、Hao-Ran Zhang、Kai-Fan Zhang、Yi-Ning Wang、Xi-Sheng Wang
DOI:10.1002/anie.201803228
日期:2018.6.25
bidentate and monodentate pyridine‐type nitrogen ligands with nickel, which in situ generated a variety of readily tunable catalysts to promote fluoroalkylation with broad scope with respect to both coupling partners. This combinatorial catalysis strategy offers a solution for nickel‐catalyzedreductivecross‐coupling reactions and provides an efficient way to synthesize fluoroalkylated druglike molecules
Traceless Benzylic C−H Amination via Bifunctional
<i>N</i>
‐Aminopyridinium Intermediates
作者:Pritam Roychowdhury、Roberto G. Herrera、Hao Tan、David C. Powers
DOI:10.1002/anie.202200665
日期:2022.7.11
C−Hamination chemistry viatracelessbifunctional nitrogen activation is reported. Sequential C−H aminopyridylation followed by Ni-catalyzed cross-coupling with aryl boronic acids affords the products of aryl nitrene insertion into C−H bonds. These products are unavailable by direct nitrene insertion due to the intrinsic instability of aryl nitrenes. The described method can be applied in the context
The nickel-catalyzed cross-coupling of bromodifluoromethylphosphonates with arylboron reagents was developed with a 1,10-phenanthroline-type ligand. In this process, functionalized and heterocycle-containing boroxines were found to be suitable partners, and the catalytic modification of biologically active molecules, such as fenofibrate and indomethacin, was also successfully achieved. Furthermore