Reactions of Aryliminodimagnesium with Some<i>N</i>,<i>N</i>-Dimethylcarboxamides and Benzonitriles Affording Various Types of Amidines. Correction of Previous Results on Formamidine Formation from<i>N</i>,<i>N</i>-Dimethylformamide
Some symmetrical and unsymmetrical form- and benzamidines were prepared by the reaction of ArN(MgBr)2 with Ar’CN, HCONMe2 and related compounds in tetrahydrofurn.
Manganese-Catalyzed [4 + 2] Annulation of N–H Amidines with Vinylene Carbonate via C–H Activation
作者:Yudong Li、Huan Wang、Ying Li、Yang Li、Yuxia Sun、Chungu Xia、Yuehui Li
DOI:10.1021/acs.joc.1c02473
日期:2021.12.17
Manganese-catalyzed C–H bond functionalization of aryl amidines for the synthesis of 1-aminoisoquinolines in the presence of vinylenecarbonate has been developed. The reaction features a broad substrate scope and proceeds under mild reaction conditions with only the carbonate anion as the byproduct.
Selective Synthesis of Aminoisoquinolines via Rh(III)-Catalyzed C–H/N–H Bond Functionalization of <i>N</i>-Aryl Amidines with Cyclic 2-Diazo-1,3-diketones
C–H/N–H bond functionalization of N-aryl amidines with cyclic 2-diazo-1,3-diketones for the synthesis of 1-aminoisoquinolines has been accomplished by employing [Cp*RhCl2]2/CsOPiv as the catalyst system. This methodology proceeds by a cascade C–H activation/intramolecular cyclization under mild reaction conditions, features a broad substrate scope, and involves the formation of two new σ bonds (C–C and
CuI-Catalyzed Oxidative [3 + 2] Reaction of Fullerene with Amidines or Amides Using Air as the Oxidant: Preparation of Fulleroimidazole or Fullerooxazole Derivatives
CuI-catalyzed oxidative reaction of amidines with C60 using air as the oxidant has been exploited for the easy preparation of fulleroimidazole derivatives. Furthermore, this kind of CuI-catalyzed [3 + 2] reaction has also been successfully applied in the synthesis of fullerooxazole derivatives starting from amides for the first time. The substrate scope is broad, and the process is particularly cheap
Metal‐Free Cascade 1,4‐Conjugate Addition/Selective Annulation Strategy for Divergent Synthesis of Polysubstituted Imidazoles and 4‐Alkenylquinazolines
作者:Qiang Tang、Keke Xu、Xinwei He、Yongjia Shang
DOI:10.1002/adsc.202200905
日期:2022.12.8
metal-free cascade annulation of propagylamines with amidines for divergent synthesis of polysubstituted imidazoles and 4-alkenylquinazolines has been developed. The reaction is believed to proceed by sequential 1,4-conjugate addition of amidines to propargylamines, 5-exo-dig annulation/aromatization to form the polysubstituted imidazoles, and nucleophilic addition/elimination/aromatization to quinazoline