Nickel-Catalyzed Sulfonylation of C(<i>sp</i><sup>2</sup>)-H Bonds with Sodium Sulfinates
作者:Shuang-Liang Liu、Xue-Hong Li、Shu-Sheng Zhang、Sheng-Kai Hou、Guang-Chao Yang、Jun-Fang Gong、Mao-Ping Song
DOI:10.1002/adsc.201700290
日期:2017.7.3
substrate scope and good functional group tolerance with high monosulfonylation selectivity. Besides arenes and heteroarenes, the reaction can also be extended to alkenes, providing diverse diaryl and alkylarylsulfones in high yields. Furthermore, a plausible Ni(I)/Ni(III) mechanism is outlined based on our experimental results and related precedents.
Expedient Iron-Catalyzed C−H Allylation/Alkylation by Triazole Assistance with Ample Scope
作者:Gianpiero Cera、Tobias Haven、Lutz Ackermann
DOI:10.1002/anie.201509603
日期:2016.1.22
for the iron‐catalyzed C−H allylation of arenes, heteroarenes, and alkenes with ample scope. The versatile catalyst also proved competent for site‐selective methylation, benzylation, and alkylation with challenging primary and secondary halides. Triazole‐assisted C−H activation proceeded chemo‐, site‐, and diastereo‐selectively, and the modular TAM directing group was readily removed in a traceless
Copper‐Promoted Thiolation of C(sp
<sup>2</sup>
)–H Bonds Using a 2‐Amino Alkylbenzimidazole Directing Group
作者:Shuang‐Liang Liu、Xue‐Hong Li、Tan‐Hao Shi、Guang‐Chao Yang、Hai‐Li Wang、Jun‐Fang Gong、Mao‐Ping Song
DOI:10.1002/ejoc.201700147
日期:2017.4.26
by using 2-amino alkylbenzimidazole (MBIP amine) as a new and removable N,N-bidentate directing group. This strategy gives a variety of functionalized thioethers in moderate to excellent yields in a simple and efficient way. Importantly, the substrate scope is not limited to aromaticamides; diverse alkenyl amides are also compatible. Furthermore, this synthetic approach provides a potentially feasible
Nickel-Catalyzed Direct Alkylation of C–H Bonds in Benzamides and Acrylamides with Functionalized Alkyl Halides via Bidentate-Chelation Assistance
作者:Yoshinori Aihara、Naoto Chatani
DOI:10.1021/ja401344e
日期:2013.4.10
The alkylation of the ortho C-H bonds in benzamides and acrylamides containing an 8-aminoquinoline moiety as a bidentate directing group with unactivated alkylhalides using nickel complexes as catalysts is described. The reaction shows high functional group compatibility. In reactions of meta-substituted aromatic amides, the reaction proceeds in a highly selective manner at the less hindered C-H bond
Novel benzimidazole derivatives of the formula ##SPC1## Wherein R is alkyl of 1 to 2 carbon atoms and R.sub.1 is selected from the group consisting of tetrahydrofurfuryl, a saturated or unsaturated oxygen heterocycle of 4 to 5 carbon atoms and ##EQU1## wherein Z is unsaturated hydrocarbon radical of 2 to 4 carbon atoms having at least 2 halogen atoms which possess fungicidal activity.