18999-48-9Relevant academic research and scientific papers
Efficient protocol for Aza-Michael addition of N-heterocycles to α,β-unsaturated compound using [Ch]OH and [n-butyl urotropinium]OH as basic ionic liquids in aqueous/solvent free conditions
Kumar, Sitanshu,Kaur, Amanpreet,Singh, Vasundhara
, p. 193 - 201 (2019/01/24)
The present work emphasizes on a green methodology using designed and synthesized basic ionic liquid, [n-butyl Urotropinium]OH, and commercially available aqueous solution of choline hydroxide [Ch]OH as catalysts for executing Aza-Michael addition of N-heterocycles to α,β-unsaturated compounds at room temperature. The highlighting features of these catalysts include using low concentration of both catalysts along with [Ch]OH being low cost and biodegradable, [n-butyl Urotropinium]OH significantly enhancing the high substrate/catalyst ratio to obtain the desired products in high yield and purity in most cases. Further, both catalysts were recyclable and recoverable up to five cycles.
Intramolecular cyclization of alkylimidazoles
Joshi, Madhur S.,Lansakara, Ashabha I.,Pigge, F. Christopher
supporting information, p. 3204 - 3207 (2015/06/02)
1,2-Dialkylimidazoles can be converted to nucleophilic 2-alkylidene imidazolines upon treatment with (BOC)2O under mild conditions. Incorporation of a β-keto amide carbonyl electrophile in the 2-alkylimidazole side chain results in intramolecul
Polystyrene-supported CuI-imidazole complex catalyst for aza-Michael reaction of imidazoles with α,β-unsaturated compounds
Li, Lixia,Liu, Zuliang,Ling, Qilong,Xing, Xiaodong
experimental part, p. 178 - 184 (2012/03/09)
The polystyrene-supported CuI-imidazole complex catalyst was prepared and characterized by IR spectroscopy, elemental analysis, SEM/TEM and TG/DSC. The complex catalyst was globular with the size of 400-500 nm and showed a good thermal stability at high temperature. The immobilized Cu metal in the complex catalyst was about 0.85 mmol/g. By using the catalyst, aza-Michael reaction of imidazoles to α,β-unsaturated compounds was performed with good yields in 4-8 h. The catalyst showed an excellent recycling efficiency over five cycles without distinct leaching of metal from the polymer support.
Synthesis and biological evaluation of novel 99mtc-labelled bisphosphonates as superior bone imaging agents
Qiu, Ling,Cheng, Wen,Lin, Jianguo,Luo, Shineng,Xue, Li,Pan, Jing
experimental part, p. 6165 - 6178 (2011/10/12)
A series of novel zoledronic acid (ZL) derivatives 1-hydroxy-3-(2-methyl- 1H-imidazol-1-yl)propane-1,1-diyldiphosphonic acid (MIPrDP), 1-hydroxy-4-(2-methyl-1H-imidazol-1-yl)butane-1,1-diyldiphosphonic acid (MIBDP), and 1-hydroxy-5-(2-methyl-1H-imidazol-1-yl)pentane-1,1-diyldiphosphonic acid (MIPeDP) were prepared and successfully labeled with 99mTc in high labeling yields. The in vitro stability and in vivo biodistribution of 99mTc-MIPrDP, 99mTc-MIBDP and 99mTc-MIPeDP were investigated and compared. The biodistribution studies indicate that the radiotracer 99mTc-MIPrDP has highly selective uptake in the skeletal system and rapid clearance from soft tissues. The present findings indicate that 99mTc-MIPrDP holds great potential for use in bone imaging.
NOVEL IMIDAZOLYLALKYLCARBONYL DERIVATIVES AS CALCIUM CHANNEL MODULATORS AND PREPARATION METHOD THEREOF
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Page/Page column 8, (2010/01/31)
Disclosed are novel imidazolylalkylcarbonyl derivatives useful as calcium channel modulators and a preparation method of the same. Also disclosed is a method for the treatment of diseases by administering the above compounds based on their inhibitory acti
Novel Tetrahydropyridothiophenes
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Page/Page column 64-65, (2008/12/04)
Compounds of a certain formula (I) in which Ra and Rb have the meanings indicated in the description, are novel effective compounds with anti-proliferative and apoptosis inducing activity.
