Highly Selective Hydrogenation of Aromatic Ketones and Phenols Enabled by Cyclic (Amino)(alkyl)carbene Rhodium Complexes
作者:Yu Wei、Bin Rao、Xuefeng Cong、Xiaoming Zeng
DOI:10.1021/jacs.5b05868
日期:2015.7.29
complexes ligated by strongly σ-donating cyclic (amino)(alkyl)carbenes (CAACs) show unique catalytic activity for the selective hydrogenation of aromatic ketones and phenols by reducing the aryl groups. The use of CAAC ligands is essential for achieving high selectivity and conversion. This method is characterized by its good compatibility with unsaturated ketones, esters, carboxylic acids, amides, and
Activation of SiH, BH, and PH Bonds at a Single Nonmetal Center
作者:Guido D. Frey、Jason D. Masuda、Bruno Donnadieu、Guy Bertrand
DOI:10.1002/anie.201005698
日期:2010.12.3
Carbenes more than measure up: Singlet stable carbenes compete with transition metals in the activation of enthalpically strong bonds, as shown by the cleavage of the EHbonds of silanes, boranes, and phosphanes (see scheme). However, in contrast with the electrophilic mode of activation observed with metals, carbenes act as nucleophiles towards these substrates. Dipp=2,6‐diisopropylphenyl.
<sup>31</sup>P NMR Chemical Shifts of Carbene-Phosphinidene Adducts as an Indicator of the π-Accepting Properties of Carbenes
作者:Olivier Back、Martin Henry-Ellinger、Caleb D. Martin、David Martin、Guy Bertrand
DOI:10.1002/anie.201209109
日期:2013.3.4
Beyond the Tolman electronic parameter: The 31PNMRchemicalshifts of easily synthesized carbene–phenylphosphinidene adducts allow the determination of the relative π‐acceptor properties of carbenes. In combination with the Tolman electronic parameter value, the relative pure σ‐donation of carbenes can also be evaluated.
超越托尔曼电子参数:易于合成的卡宾 - 苯基膦亚基加合物的31 P NMR 化学位移允许确定卡宾的相对 π 受体特性。结合托尔曼电子参数值,还可以评估卡宾的相对纯 σ 供体。
Highly Reactive Cyclic(alkyl)(amino) Carbene- and <i>N</i>-Heterocyclic Carbene-Bismuth(III) Complexes: Synthesis, Structure, and Computations
作者:Guocang Wang、Lucas A. Freeman、Diane A. Dickie、Réka Mokrai、Zoltán Benkő、Robert J. Gilliard
DOI:10.1021/acs.inorgchem.8b01813
日期:2018.9.17
Cyclic(alkyl)(amino) carbene (CAAC)-stabilized complexes of phosphorus, one of the lightest group 15 elements, are well-established and can often be obtained in high yields. In contrast, analogous CAAC compounds of bismuth, the heaviest nonradioactive member of group 15, are unknown. Indeed, reactivity increases as you descend the group, and as a result there are only a few examples of N-heterocyclic
PREPARATION OF PRECURSORS OF CARBENES OF CAAC TYPE AND PREPARING SAID CARBENES THEREFROM
申请人:Mignani Gérard
公开号:US20100113791A1
公开(公告)日:2010-05-06
Precursors of carbenes of CAAC type (Cyclic)(Alkyl)(Amino)(Carbenes) are prepared and carbenes are produced therefrom; novel synthesis intermediates are provided for preparing the precursors of CAAC-type carbenes.