18678-14-3Relevant academic research and scientific papers
Synthesis of 2-aryl quinazolinones: Via iron-catalyzed cross-dehydrogenative coupling (CDC) between N-H and C-H bonds
Jang, Yoonkyung,Lee, Seok Beom,Hong, Junhwa,Chun, Simin,Lee, Jeeyeon,Hong, Suckchang
supporting information, p. 5435 - 5441 (2020/08/03)
Herein, we describe the direct synthesis of quinazolinones via cross-dehydrogenative coupling between methyl arenes and anthranilamides. The C-H functionalization of the benzylic sp3 carbon is achieved by di-t-butyl peroxide under air, and the subsequent amination-aerobic oxidation process completes the annulation process. Iron catalyzed the whole reaction process and various kinds of functional groups were tolerated under the reaction conditions, providing 31 examples of 2-aryl quinazolinones using methyl arene derivatives in yields of 57-95percent. The synthetic potential has been demonstrated by the additional synthesis of aryl-containing heterocycles. This journal is
Chemical Space Exploration around Thieno[3,2- d]pyrimidin-4(3 H)-one Scaffold Led to a Novel Class of Highly Active Clostridium difficile Inhibitors
Shao, Xuwei,Abdelkhalek, Ahmed,Abutaleb, Nader S.,Velagapudi, Uday Kiran,Yoganathan, Sabesan,Seleem, Mohamed N.,Talele, Tanaji T.
, p. 9772 - 9791 (2019/11/03)
Clostridium difficile infection (CDI) is the leading cause of healthcare-associated infection in the United States. Therefore, development of novel treatments for CDI is a high priority. Toward this goal, we began in vitro screening of a structurally diverse in-house library of 67 compounds against two pathogenic C. difficile strains (ATCC BAA 1870 and ATCC 43255), which yielded a hit compound, 2-methyl-8-nitroquinazolin-4(3H)-one (2) with moderate potency (MIC = 312/156 μM). Optimization of 2 gave lead compound 6a (2-methyl-7-nitrothieno[3,2-d]pyrimidin-4(3H)-one) with improved potency (MIC = 19/38 μM), selectivity over normal gut microflora, CC50s > 606 μM against mammalian cell lines, and acceptable stability in simulated gastric and intestinal fluid. Further optimization of 6a at C2-, N3-, C4-, and C7-positions resulted in a library of >50 compounds with MICs ranging from 3 to 800 μM against clinical isolates of C. difficile. Compound 8f (MIC = 3/6 μM) was identified as a promising lead for further optimization.
Copper-mediated synthesis of quinazolin-4(3: H)-ones from N-(quinolin-8-yl)benzamide and amidine hydrochlorides
Ban, Zihui,Cui, Xinfeng,Hu, Fangpeng,Lu, Guoqiang,Luo, Nan,Huang, Guosheng
supporting information, p. 12963 - 12966 (2019/08/28)
An efficient copper-mediated tandem C(sp2)-H amination to provide quinazolinones from N-(quinolin-8-yl)benzamide and amidine hydrochlorides has been developed. It can afford rather complex products in a single step synthesis from easily availab
Method for synthesizing 2-heterocyclic benzene (2,3-d) pyrimidine-4(3H)-ketone compounds
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Paragraph 0035-0042; 0070-0073; 0074-0077; 0078-0085, (2018/11/03)
The invention discloses a method for synthesizing 2-heterocyclic benzene (2,3-d) pyrimidine-4(3H)-ketone compounds. Carbon bond rupture of styrene compound carbon is utilized to generate benzaldehydecompounds, the generated benzaldehyde compounds and heterocyclic o-amino-formamide compounds are subjected to intermolecular condensation coupling reaction to obtain the 2-heterocyclic benzene (2,3-d)pyrimidine-4(3H)-ketone compounds, wherein the styrene compounds refer to styrene or 2-ethoxystyrene, and the heterocyclic o-amino-formamide compounds refer to 3-aminothiophene-2-formamide or 4-amino-1-methyl-3-n-propyl-1H-pyrazol-5-formamide. The method has the advantages that raw materials are easy to obtain, and more economy is achieved; efficient reaction and high yield are achieved; high temperature and high pressure are not needed, and reaction conditions are moderate; the synthesis process is easy to operate, and the obtained product is easy for post-processing and suitable for large scale production.
Direct metallation of thienopyrimidines using a mixed lithium-cadmium base and antitumor activity of functionalized derivatives
Snegaroff, Katia,Lassagne, Frederic,Bentabed-Ababsa, Ghenia,Nassar, Ekhlass,Ely, Sidaty Cheikh Sid,Stephanie Hesse,Perspicace, Enrico,Derdour, Aicha,Mongin, Florence
experimental part, p. 4782 - 4788 (2009/12/08)
A series of thieno[2,3-d]- and thieno[3,2-d]pyrimidines have been easily synthesized using as key step a deproto-cadmiation-trapping sequence. Some of the compounds thus synthesized were screened for anticancer (cytotoxic) activities, and (S)-2-(6-iodo-2-
Design, synthesis, and biological activities of new thieno[3,2- d]pyrimidines as selective type 4 phosphodiesterase inhibitors
Crespo, Maria I.,Pagès, Lluís,Vega, Armando,Segarra, Victor,López, Manel,Doménech, Teresa,Miralpeix, Montserrat,Beleta, Jordi,Ryder, Hamish,Palacios, José M.
, p. 4021 - 4035 (2007/10/03)
A common pharmacophore for compounds structurally related to nitraquazone has been derived. Using this pharmacophore, new structures have been designed, synthesized, and evaluated for their inhibitory potencies against cyclic adenosine 5'-monophosphate (c
