Iridium(III)-Catalyzed Alkynylation of 2-(Hetero)arylquinazolin-4-one Scaffolds via C–H Bond Activation
摘要:
The directed C-H alkynylation of 2-(hetero)arylquinazolin-4-ones has been explored with the ethynylbenziodoxolone reagent TIPS-EBX employing an Ir(III) catalyst. Complementary conditions for either monoalkynylation or dialkynylation have been developed. Also demonstrated is the broad scope of this reaction and the compatibility of various functional groups such as -F, -Cl, -Br, -CF3, -OMe, -NO2, and alkyl, etc.
Palladium‐Catalyzed Carbonylative Difunctionalization of C=N Bond of Azaarenes or Imines to Quinazolinones
作者:Xibing Zhou、Yongzheng Ding、Hanmin Huang
DOI:10.1002/asia.202000359
日期:2020.6.2
Supporting information for this article is given via a link at the end of the document. By intercepting the acylpalladium species with C=Nbond of azaarenes or imines other than free amines or alcohols, the difunctionalization of C=Nbond was established via palladium‐catalyzed carbonylation/nucleophilic addition sequence. This method is compatible with a diverse range of azaarenes and imines and allows
Condensation of anthranilic acids with pyridines to furnish pyridoquinazolones via pyridine dearomatization
作者:Yajun Yang、Cuiju Zhu、Min Zhang、Shijun Huang、Jingjing Lin、Xiandao Pan、Weiping Su
DOI:10.1039/c6cc07365d
日期:——
The unprecedented carbodiimide-mediated condensation between pyridines and anthranilicacids via pyridines dearomatization at room temperature has been developed to provide a straightforward approach to pyridoquinazolones. The value of this approach...
Copper-catalyzed synthesis of pyrido-fused quinazolinones from 2-aminoarylmethanols and isoquinolines or tetrahydroisoquinolines
作者:Thao T. Nguyen、Khang X. Nguyen、Phuc H. Pham、Duc Ly、Duyen K. Nguyen、Khoa D. Nguyen、Tung T. Nguyen、Nam T. S. Phan
DOI:10.1039/d1ob00229e
日期:——
Pyrido-fused quinazolinones were synthesized via copper-catalyzed cascade C(sp2)–H amination and annulation of 2-aminoarylmethanols with isoquinolines or pyridines. The transformation proceeded readily in the presence of a commercially available CuCl2 catalyst with molecular oxygen as a green oxidant. Moreover, the dehydrogenative cross-coupling of 2-aminoarylmethanols with tetrahydroisoquinolines
Copper-Mediated Tandem C(<i>sp</i>
<sup>2</sup>
)-H Amination and Annulation of Arenes with 2-Aminopyridines: Synthesis of Pyrido-fused Quinazolinone Derivatives
作者:Jidan Liu、Jinhui Zou、Jiawei Yao、Guoshu Chen
DOI:10.1002/adsc.201701286
日期:2018.2.15
An efficient and convenient copper‐mediated tandem C(sp2)‐H amination and annulation of arenes with 2‐aminopyridines to provide 11H‐pyrido[2,1‐b]quinazolin‐11‐ones has been developed. A variety of benzamides and 2‐aminopyridines bearing different substituents are compatible with this transformation
开发了一种高效便捷的铜介导的串联C(sp 2)-H胺化和芳烃与2-氨基吡啶的环化反应,以提供11个H-吡啶并[ 2,1- b ]喹唑啉-11-酮的方法。各种带有不同取代基的苯甲酰胺和2-氨基吡啶与这种转化相容
Palladium/Silver Synergistic Catalysis in Direct Aerobic Carbonylation of C(sp<sup>2</sup>)<i>−</i>H Bonds Using DMF as a Carbon Source: Synthesis of Pyrido-Fused Quinazolinones and Phenanthridinones
作者:D. Nageswar Rao、Sk. Rasheed、Parthasarathi Das
DOI:10.1021/acs.orglett.6b01292
日期:2016.7.1
An unprecedented Pd/Ag synergistic catalysis in the direct carbonylation of C(sp2)–H bonds utilizing DMF as the carbon source under oxygen is described and demonstrated in the synthesis of pyrido-fused quinazolinone and phenanthridinone scaffolds. Control experiments indicated that the “C” of the carbonyl group is derived from the methyl group of DMF and “O” originates from oxygen as in the case of