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
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
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
Sterically Controlled Ru(II)-Catalyzed Divergent Synthesis of 2-Methylindoles and Indolines through a C–H Allylation/Cyclization Cascade
作者:Manash Kumar Manna、Gurupada Bairy、Ranjan Jana
DOI:10.1021/acs.joc.8b01034
日期:2018.8.3
A ruthenium-catalyzedsynthesis of 2-methylindole was accomplished via a C–H allylation/oxidative cyclization cascade. Strategically, β-hydride elimination from the σ-alkyl-Ru intermediate has been suppressed by steric hindrance from a remote position. Hence, 2-methylindolines from the corresponding ortho-substituted anilines were achieved via protodemetalation in lieu of β-hydride elimination under
Rhodium(<scp>iii</scp>)-catalyzed regioselective oxidative annulation of anilines and allylbenzenes <i>via</i> C(sp<sup>3</sup>)–H/C(sp<sup>2</sup>)–H bond cleavage
作者:Yunqi Liu、Yudong Yang、Chunxia Wang、Zhishuo Wang、Jingsong You
DOI:10.1039/c8cc09099h
日期:——
and directed C(sp2)–H activation into a single approach for discovering unprecedented chemical transformations. As a proof-of-concept, we disclose for the first time the rhodium-catalyzed regioselectiveoxidative annulation of anilines with allylbenzenes to deliver a variety of indoles. In this work, the C3 and C2 positions of the allylic segment are set to construct C–N and C–C bonds, respectively