Iron‐Catalyzed
<i>ortho</i>
C−H Arylation and Methylation of Pivalophenone N−H Imines
作者:Wengang Xu、Naohiko Yoshikai
DOI:10.1002/cssc.201900164
日期:2019.7.5
Iron‐catalyzed ortho C−H arylation and methylation reactions of pivalophenone N−H imines are reported. The pivaloyl N−H imine proved an excellent directing group for the arylation with diarylzinc reagents in the presence of an iron‐diphosphine catalyst and 2,3‐dichlorobutane at room temperature. A similar catalytic system also allowed methylation with Me3Al at 70 °C. The pivaloyl imine of the product
Cooperative Lewis Acid/Cp*Co
<sup>III</sup>
Catalyzed C−H Bond Activation for the Synthesis of Isoquinolin‐3‐ones
作者:Ju Hyun Kim、Steffen Greßies、Frank Glorius
DOI:10.1002/anie.201601003
日期:2016.4.25
A facile route toward the synthesis of isoquinolin‐3‐ones through a cooperative B(C6F5)3‐ and Cp*CoIII‐catalyzed C−H bond activation of imines with diazo compounds is presented. The inclusion of a catalytic amount of B(C6F5)3 results in a highly efficient reaction, thus enabling unstable NH imines to serve as substrates.
提出了一种通过协同的B(C 6 F 5)3-和Cp * Co III催化的重氮化合物亚胺的CH键活化合成异喹啉-3-酮的简便方法。包含催化量的B(C 6 F 5)3导致高效反应,从而使不稳定的NH亚胺成为底物。
Redox‐Neutral Manganese(I)‐Catalyzed C−H Activation: Traceless Directing Group Enabled Regioselective Annulation
作者:Qingquan Lu、Steffen Greßies、Sara Cembellín、Felix J. R. Klauck、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.201707396
日期:2017.10.2
groups (TDGs) are used to promote the redox‐neutral MnI‐catalyzed regioselectivesynthesis of N‐heterocycles. Alkyne coupling partners bearing a traceless directing group, which serves as both the chelator and internal oxidant, were used to control the regioselectivity of the annulation reactions. This operationally simple approach is highly effective with previously challenging unsymmetrical alkyne
Enantioselective Transformations from Nitriles to NH
<sub>2</sub>
‐α‐Tertiary Amines
作者:Qing Li、Yinrui Shi、Yina Ma、Liuyang Ding、Xiang Li、Jiuling Li、Yafei Guo、Baomin Fan
DOI:10.1002/chem.202300451
日期:——
A new catalytic strategy from commercial nitriles to high enantioselective α-tertiary primary amines in up to 90 % yield and 95 % enantiomeric excess was developed. This approach goes through twice addition processes in one pot. Specifically, organolithium reagents were added to nitriles to form the imine intermediates in situ which were further transformed by a catalytic asymmetric addition of Cu-allyl