使用单一的半夹心铁(II)化合物作为催化剂,将Cp * Fe(1,2-Ph 2 PC 6 H 4 S)(NCMe)(Cp * – = C 5 Me 5 –,1)作为催化剂,进行还原偶联明确定义的铁(II)/(EtO)3 SiH体系可实现硝基芳烃与烯烃的合成。通过分子间或分子内的还原偶联,已经在一锅中直接合成了各种支链胺和吲哚衍生物。机理研究表明,催化作用是由铁(II)催化剂与硅烷活化硝基芳烃而引发的,从而生成用于C-N键偶联的铁-亚硝基芳烃中间体。
bisphosphine monochelation to transition metals under conditions where homogeneousligands may form bischelated single metal complexes or multinuclear complexes. PS-DPPBz showed high ligand performance in first-row transition metal catalysis, enabling challenging molecular transformations that were not possible through the screening of existing homogeneousligands. In the Ni-catalyzed amination of aryl
Iron-Catalyzed Oxidative Amination of Benzylic C(sp<sup>3</sup>)–H Bonds with Anilines
作者:Yan-Ling Song、Bei Li、Zhen-Biao Xie、Dan Wang、Hong-Mei Sun
DOI:10.1021/acs.joc.1c02311
日期:2021.12.17
Iron-catalyzed oxidative amination of benzylic C(sp3)–H bonds with anilines bearing electron-withdrawing groups (EWGs) or electron-donating groups (EDGs) is realized based on simple variations of N-substituents on imidazolium cations in novel ionic Fe(III) complexes. The structural modification of the imidazolium cation resulted in regulation of the redox potential and the catalytic performance of
基于新型离子 Fe 中咪唑鎓阳离子上 N 取代基的简单变化,实现了苄基 C(sp 3 )-H 键与带有吸电子基团 (EWG) 或供电子基团 (EDG) 的苯胺的铁催化氧化胺化(三)配合物。咪唑鎓阳离子的结构改性导致氧化还原电位和铁金属中心催化性能的调节。使用DTBP作为氧化剂,[HI t Bu][FeBr 4 ]对带有EWG的苯胺表现出最高的催化活性,而[HIPym][FeBr 4 ]对EDG取代的苯胺更有效。这项工作为苄胺提供了替代途径,同时具有广泛的底物范围和铁催化的优点。
Direct Amination of α-Triaryl Alcohols via Vanadium Catalysis
作者:Jinglei Yang、Yun-Dong Wu、Maoping Pu
DOI:10.1021/acs.joc.3c00414
日期:2023.6.2
α-Triaryl amines have been used as pharmaceuticals and pharmaceutical intermediates for antifungal and anticancer applications. Current methods to synthesize such compounds require at least two steps, and no directamination of tertiary alcohols has been reported. Herein, we disclose efficient catalytic conditions for the directamination of α-triaryl alcohols to access α-triaryl amines. VO(OiPr)3
α-三芳基胺已被用作抗真菌和抗癌应用的药物和药物中间体。目前合成此类化合物的方法至少需要两步,并且没有报道过直接胺化叔醇。在此,我们公开了直接胺化 α-三芳基醇以获得 α-三芳基胺的有效催化条件。VO(O i Pr) 3,一种市售试剂,已被确定为几种α-三芳基醇直接胺化的有效催化剂。这个过程是可扩展的,正如克级合成所证明的那样,反应在低至 0.01 mol% 的催化剂负载下仍然有效,周转数达到 3900。此外,包括克霉唑和氟霉唑在内的商业药物已成功快速制备,有效地使用这种新开发的方法。
Lee, Ikchoon; Koh, Han Joong; Hong, Sung Nam, Gazzetta Chimica Italiana, 1995, vol. 125, # 8, p. 347 - 352
作者:Lee, Ikchoon、Koh, Han Joong、Hong, Sung Nam、Lee, Bon-Su
DOI:——
日期:——
Koh, Han Joong; Lee, Hai Whang; Lee, Ikchoon, Journal of the Chemical Society. Perkin transactions II, 1994, # 1, p. 125 - 130