Lewis-acid Promoted Chemoselective Condensation of 2-Aminobenzimidazoles or 3-Aminoindazoles with 3-Ethoxycyclobutanones to Construct Fused Nitrogen heterocycles
作者:Weiguang Kong、Yao Zhou、Qiuling Song
DOI:10.1002/adsc.201701641
日期:2018.5.16
or 3‐aminoindazoles with 3‐ethoxycyclobutanones is presented. Diverse fused heterocyclesbenzo[4,5]‐imidazo[1,2‐a]pyrimidine and pyrimido[1,2‐b]‐indazole derivatives were obtained in moderate to high yields under mild conditions, the reaction mechanism of which was in sharp contrast to previous [3+3] annulation reaction of 3‐ethoxycyclobutanones.
介绍了路易斯酸促进的2-氨基苯并咪唑或3-氨基吲唑与3-乙氧基环丁酮的化学选择性缩合。在温和条件下以中等至高收率获得了多种稠合杂环苯并[4,5]-咪唑并[1,2- a ]嘧啶和嘧啶基[1,2- b ]-吲唑衍生物与以前的3-乙氧基环丁酮的[3 + 3]环化反应形成对比。
Inhibition and Dispersion of Bacterial Biofilms with 2-Aminobenzimidazole Derivatives
申请人:BLACKWELL Helen
公开号:US20130136782A1
公开(公告)日:2013-05-30
Compounds described herein inhibit biofilm formation or disperse pre-formed biofilms of Gram-negative bacteria. Biofilm-inhibitory compounds can be encapsulated or contained in a polymer matrix for controlled release. Coatings, films, multilayer films, hydrogels, microspheres and nanospheres as well as pharmaceutical compositions and disinfecting compositions containing biofilm-inhibitory compounds are also provided. Methods for inhibiting formation of biofilms or dispersing already formed biofilms are provided. Methods for treating infections of gram-negative bacteria which form biofilms, particularly those of
Pseudomonas
and more particularly
P. aeruginosa.
A series of benzothiazolyl amides and benzimidazolyl amides (6a-f) has been synthesized from the coupling reaction of substituted picolinic acid with benzothiazole and benzimidazoles, respectively. The newly synthesized compounds were evaluated for their efficacy as antimicrobial agents against various Gram-positive and Gram-negative strains of bacteria and fungal strains. Amongst these compounds 6f was found to be the most potent against Bacillus subtilis and Candida albicans. Moreover, other compounds also found to be potential antibacterial agents in comparison to the standard drugs.
The invention relates to a method for preventing or treating a disease or disorder that is associated with the MrgX2 receptor. The invention also relates to MrgX2 antagonists and physiologically acceptable salts thereof. The invention also relates to pharmaceutical compositions and dosage forms comprising an MrgX2 antagonist.
Cu-Catalyzed Synthesis of 3-Formyl Imidazo[1,2-<i>a</i>]pyridines and Imidazo[1,2-<i>a</i>]pyrimidines by Employing Ethyl Tertiary Amines as Carbon Sources
作者:Changqing Rao、Shaoyu Mai、Qiuling Song
DOI:10.1021/acs.orglett.7b02015
日期:2017.9.15
A highly efficient synthesis of 3-formyl imidazo[1,2-a]pyridine and imidazo[1,2-a]pyrimidine, under Cu-catalyzed aerobic oxidative conditions and by utilizing ethyl tertiary amines as carbon sources, is disclosed. A novel activation mode of ethyl tertiary amines in which simultaneous selective cleavage of C–C bond and C–N bond of ethyl group with molecular oxygen as terminal oxidant in this one-pot
公开了在Cu催化的需氧氧化条件下并利用乙基叔胺作为碳源的3-甲酰基咪唑并[1,2- a ]吡啶和咪唑并[1,2- a ]嘧啶的高效合成方法。首次报道了一种乙基叔胺的新型活化方式,其中在此一锅操作方案中首次报道了用分子氧作为末端氧化剂同时选择性地裂解乙基的C–C键和C–N键。该反应具有广泛的底物范围,良好的官能团耐受性以及多样化且有价值的产品。