A General Strategy for the Nickel-Catalyzed C−H Alkylation of Anilines
作者:Zhixiong Ruan、Sebastian Lackner、Lutz Ackermann
DOI:10.1002/anie.201510743
日期:2016.2.24
The C−H alkylation of aniline derivatives with both primary and secondary alkyl halides was achieved with a versatile nickel catalyst of a vicinal diamine ligand. Step‐economic access to functionalized 2‐pyrimidyl anilines, key structural motifs in anticancer drugs, is thus provided. The C−H functionalization proceeded through facile C−H activation and SET‐type C−X bond cleavage with the assistance
Nickel-catalyzed alkyne annulation by anilines: versatile indole synthesis by C–H/N–H functionalization
作者:Weifeng Song、Lutz Ackermann
DOI:10.1039/c3cc43915a
日期:——
Versatile nickel catalysts enabled the step-economical synthesis of decorated indoles through alkyne annulations with anilines bearing removable directing groups. The CâH/NâH activation strategy efficiently occurred in the absence of any metal oxidants and with excellent selectivities.
Cross-conjugated and pseudo-cross-conjugated mesomeric betaines, XVIII: Bicyclic mesoionic pyrimidines with cardiovascular activity
作者:C. Oliver Kappe、Thomas Kappe
DOI:10.1002/ardp.2503241108
日期:1991.11
Reaction of α‐Anilino‐azines 1a‐i with activated malonates (magic malonates) 2a‐e leads to bicyclic mesoionic systems 3–7. Out of these, pyrido[1,2‐a]pyrimidines 3b,d are active as cardiotonics, whereas pyrimido[1,2‐a]pyrimidines 4a‐g show significant anti‐anginal and anti‐hypertensive activity.
The C−H thiolation of aniline derivatives was accomplished with a versatile nickel(II) catalyst under ligand‐free conditions. The robust nature of the nickel catalysis system was reflected by the C−H thiolation with a good functional group tolerance and an ample scope, employing anilines possessing removable directing groups. The widely applicable nickel catalyst also allowed for aniline C−H selenylations
Rhodium(III)-Catalyzed Synthesis of Indole Derivatives From Pyrimidyl-Substituted Anilines and Diazo Compounds
作者:Ke Yu、Yujie Liang、Bin Li、Baiquan Wang
DOI:10.1002/adsc.201500954
日期:2016.2.18
method for the synthesis of indole derivatives from readily available pyrimidyl‐substituted anilines and diazo compounds via rhodium(III)‐catalyzed CH bond activation has been developed. This cyclization reaction displays excellent functional group compatibility and regioselectivity, which overcomes some drawbacks of the classical indole synthetic methods and provides a facileapproach for the construction