Quinazolinones have broad applications in the biological, pharmaceutical and material fields. Studies on the synthesis of these compounds are therefore widely conducted. Herein, a novel and highly efficient copper-mediated tandem C(sp2)–H amination and annulation of benzamides and amidines for the synthesis of quinazolin-4(1H)-ones is proposed. This synthetic route can be useful for the construction of quinazolin-4(1H)-one
Facile N-arylation of amidines and N,N-disubstituted amidines
作者:Tuanli Yao
DOI:10.1016/j.tetlet.2015.06.017
日期:2015.7
A metal-free method for the N-arylation of amidines and N,N-disubstituted amidines using o-silylaryl triflate under very mild reaction conditions is developed. The reactions are compatible with a variety of functional groups. Imines can also be N-arylated by this method. Preparation of substituted phenanthridines via a Pd catalyzed intramolecular cyclization of the iodine containing N-arylation product
A new strategy is developed for the synthesis of 1-aminoisoquinoline derivatives. This Rh(III)-catalyzed [4 + 2] annulation reaction employs benzamidines as efficient directing groups and the vinylenecarbonate as an acetylene surrogate. Additionally, the reaction features broad substrate scopes and good yields, only producing carbonate anion as byproduct.
Unaromatized Tetrahydrobenzimidazole Synthesis from <i>p</i>
-Benzoquinone and <i>N</i>
-Arylamidines and their Cytotoxic Potential
作者:Minh Quan Tran、Thanh Binh Nguyen、Wamtinga Richard Sawadogo、Ludmila Ermolenko、Sungmi Song、Pascal Retailleau、Marc Diederich、Ali Al-Mourabit
DOI:10.1002/ejoc.201801077
日期:2018.11.15
New tetrahydrobenzimidazoles were synthesized using a simple method from p‐benzoquinone and N‐arylamidines, and their cytotoxic potential was evaluated. Among them, three are cytotoxic in the µm range.
Metal-Free Synthesis of Polysubstituted Imidazolinone Through Cyclization of Amidines with 2-Substituted Acrylates
作者:Zhen Liu、Yan-Shun Zhang、Yin Wei、Min Shi
DOI:10.1002/ejoc.201901687
日期:2020.3.8
A facile metal‐free cascade nucleophilic cyclization of amidines with 2‐substituted acrylates has been developed, producing polysubstituted imidazolinone derivatives in moderate to good yields with a broad substrate scope.