The Direct Rh(III)-Catalyzed C–H Amidation of Aniline Derivatives Using a Pyrimidine Directing Group: The Selective Solvent Controlled Synthesis of 1,2-Diaminobenzenes and Benzimidazoles
作者:Shrikant M. Khake、Naoto Chatani
DOI:10.1021/acs.orglett.0c01126
日期:2020.5.1
The regioselective Rh(III)-catalyzed C-Hamidation of aniline derivatives with dioxazolones as an amidating reagent with a pyrimidine as a directing group leading to the production of 1,2-diaminobenzene derivatives or benzimidazole derivatives is described. The product distribution is controlled by the nature of solvent used. The reaction provides a broad substrate scope for aniline derivatives with
Pyrimidine-directed metal-free C–H borylation of 2-pyrimidylanilines: a useful process for tetra-coordinated triarylborane synthesis
作者:Supriya Rej、Amrita Das、Naoto Chatani
DOI:10.1039/d1sc02937a
日期:——
researchers. Among the various available strategies, a metal-free approach would be overwhelmingly accepted, since the target boron compounds can be prepared in a metal-free state. We herein present a detailed study of the metal-freedirected ortho-C–H borylation of 2-pyrimidylaniline derivatives. The approach allowed us to synthesize various boronates, which are synthetically important compounds and various
Pyrimidine-thiazolidinone derivatives may be used for preventing or treating diseases in humans or animals, and have demonstrated efficacy specifically in treating type-2 diabetes. Methods of synthesizing the pyrimidine-thiazolidinone derivatives, described herein, can provide high yields in a short time and with high purity. The pyrimidine-thiazolidinone derivatives demonstrate improved hypoglycemic activity compared to most anti-diabetic drugs currently available.
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.