Selective C‐alkylation Between Alcohols Catalyzed by N‐Heterocyclic Carbene Molybdenum
作者:Jiahao Liu、Weikang Li、Yinwu Li、Yan Liu、Zhuofeng Ke
DOI:10.1002/asia.202100959
日期:2021.10.18
The first molybdenum-catalyzed C-alkylation between alcohols via borrowing hydrogen is reported.
报道了第一个钼催化的醇之间通过借氢进行的 C-烷基化反应。
Manganese-Catalyzed β-Alkylation of Secondary Alcohols with Primary Alcohols under Phosphine-Free Conditions
作者:Tingting Liu、Liandi Wang、Kaikai Wu、Zhengkun Yu
DOI:10.1021/acscatal.8b01960
日期:2018.8.3
secondary alcohols with primary alcohols under phosphine-free conditions. The β-alkylated secondary alcohols were obtained in moderate to good yields with water formed as the byproduct through a borrowinghydrogen pathway. β-Alkylation of cholesterols was also effectively achieved. The present protocol provides a concise atom-economical method for C–C bond formationfrom primary and secondary alcohols.
Cobalt-Catalyzed Alkylation of Secondary Alcohols with Primary Alcohols via Borrowing Hydrogen/Hydrogen Autotransfer
作者:Frederik Freitag、Torsten Irrgang、Rhett Kempe
DOI:10.1002/chem.201701211
日期:2017.9.7
noble metals in catalysis by earth abundant 3d metals, such as Mn, Fe, or Co, (nonprecious or base metals) is a related key concept with respect to sustainability. Here, we report on the first cobalt-catalyzed alkylation of secondary alcohols with primary alcohols. Easy-to-synthesize and easy-to-activate PN5P-pincer-ligand-stabilized Co complexes developed in our laboratory mediate the reaction most
Transition metal complexes of a bis(carbene) ligand featuring 1,2,4-triazolin-5-ylidene donors: structural diversity and catalytic applications
作者:Vivek Kumar Singh、S. N. R. Donthireddy、Praseetha Mathoor Illam、Arnab Rit
DOI:10.1039/d0dt02142c
日期:——
[Ir(Cp*)Cl2]2 to generate a doubly C–H activated IrIII–NHC complex 5. Similarly, the triazolinylidene donor supported diorthometalated RuII-complex 6 is also obtained. Complexes 5 and 6 represent the first examples of a stable diorthometalated binuclear IrIII/RuII-complex supported by 1,2,4-triazolin-5-ylidene donors. The synthesized IrIII–NHC complex 5 is found to be more effective than its RuII-analogue
1,3-双(1,2,4-三唑-1-基)苯与溴乙烷的二烷基化反应会导致形成[ L -H 2 ] Br 2,在与NH 4 PF 6进行盐复分解反应后,产生带有非配位抗衡离子的双(三唑鎓)盐[ L -H 2 ](PF 6)2。[ L -H 2 ](PF 6)2和Ag 2 O以1:1的比例反应,生成组成为[(L)2 Ag 2 ](PF 6)的双核Ag I-四碳烯络合物)2与[Cu(SMe 2)Br]进行容易的金属转移反应,生成相应的Cu I -NHC络合物[(L)2 Cu 2 ](PF 6)2。相比之下,[ L -H 2 ] Br 2与[Ir(Cp *)Cl 2 ] 2反应生成双重CH-活化的Ir III -NHC络合物5。类似地,供体triazolinylidene支持的diorthometalated钌II -配合物6也被获得。配合物5和6代表由1,2,4-三唑啉-5-亚烷基供体支撑的稳定的双原金属化双核Ir
Switchable β-alkylation of Secondary Alcohols with Primary Alcohols by a Well-Defined Cobalt Catalyst
作者:Bedraj Pandey、Shi Xu、Keying Ding
DOI:10.1021/acs.organomet.1c00147
日期:2021.5.10
β-alkylation of secondaryalcohols with primaryalcohols to selectively generate alcohols by a well-defined Co catalyst is presented. Remarkably, a low catalyst loading of 0.7 mol % can be employed for the reaction. More significantly, this study represents the first Co-catalyzed switchable alcohol/ketone synthesis by simply manipulating the reaction parameters. In addition, the transformation is environmentally