Transition-Metal-Catalyzed Arylation of Nitroimidazoles and Further Transformations of Manipulable Nitro Group
摘要:
Pd- or Ni-catalyzed CH arylation of 4-nitroimidazole derivatives directed by a manipulable nitro group was developed. The reaction tolerates a wide range of substituted aryl halides and 4-nitroimidazoles. The experiments indicated that the nitro group has influence on regioselectivity of the reaction. In addition, we have shown that the efficiency of the SuzukiMiyaura cross-coupling reaction of nitroimidazoles is slightly lower in comparison to the direct CH arylation. The exploration of the chemical potential of the nitro group and a putative reaction mechanism are discussed.
VERWENDUNG SUBSTITUIERTER PYRIMIDINDIONE ODER JEWEILS DEREN SALZE ALS WIRKSTOFFE GEGEN ABIOTISCHEN PFLANZENSTRESS
申请人:Bayer CropScience AG
公开号:EP3332645A1
公开(公告)日:2018-06-13
Die Erfindung betrifft die Verwendung substituierter Pyrimidindione der Formel (I) oder deren Salze
wobei die Reste in der allgemeinen Formel (I) den in der Beschreibung gegebenen Definitionen entsprechen,
zur Erhöhung der Stresstoleranz in Pflanzen gegenüber abiotischem Stress und/oder zur Erhöhung des Pflanzenertrags.
N-Alkylation of imidazole, 2-methylimidazole and 2-methyl-4-nitroimidazole have been carried out to achieve effective antibacterial agents. The products were then investigated for antibacterial activity against Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa. Antibacterial effects of 1-alkylimidazole derivatives increase as the number of carbons in alkyl chain increases up to nine carbons. Also substitution of 2-methyl and 2-methyl-4-nitro groups on imidazole ring increases the antibacterial activity. (C) 2003 Elsevier Ltd. All rights reserved.
A Facile High Yielding Method for Synthesis of N-Alkyl-4-Nitroimidazoles
作者:A. K. S. Bhujanga Rao、C. Gundu Rao、B. B. Singh
DOI:10.1080/00397919108016766
日期:1991.2
A high yielding and fast reaction for the synthesis of a variety of N-alkyl 4-nitroimidazoles has been described. This method involves reaction of 2-methyl-4(5)-nitro-1H-imidazole with suitable alkyl halides in K2CO3/DMF at 110-120-degrees-C.
Solid — Liquid Phase — Transfer Catalytic Method for N-Alkylation of Nitroimidazole
作者:Zhen-Zhong Liu、Heng-Chang Chen、Sheng-Li Cao、Run-Tao Li
DOI:10.1080/00397919308012596
日期:1993.9
A variety of 1-alkyl-2-methyl-4-nitroimidazoles have been synthesized with a solid-liquid phase-transfer catalytic method in excellent yield.
BHUJANGA, RAO A. K. S.;GUNDU, RAO C.;, SINGH B. B., SYNTH. COMMUN., 21,(1991) N, C. 427-433
作者:BHUJANGA, RAO A. K. S.、GUNDU, RAO C.、, SINGH B. B.