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Ramazani, Ali,Nasrabadi, Fatemeh Zeinali,Ahankar, Hamideh,Asiabi, Pegah Azimzadeh,Sadri, Fariba,Joo, Sang Woo Taylor Francis 2016 Phosphorus, sulfur, and silicon and the related el Vol.191 No.2
<P>Reactions of N-isocyaniminotriphenylphosphorane (NICITPP) with 2-oxopropyl-1-benzenecarbothioate in the presence of aromatic carboxylic acids and primary amines proceed smoothly at room temperature (18-26 degrees C) and in neutral conditions to afford sterically congested 1,3,4-oxadiazole derivatives in high yields. The reaction progresses smoothly and clearly under mild conditions and no side reactions were observed.</P>
Ramazani, Ali,Nasrabadi, Fatemeh Zeinali,Abdian, Behnaz,Rouhani, Morteza Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.2
Reactions of (N-isocyanimino)triphenylphosphorane with (1R)-(-)-campherchinon in the presence of aromatic carboxylic acids proceed smoothly at room temperature and in neutral conditions to afford sterically congested 1,3,4-oxadiazole derivatives in high yields. The reaction proceeds smoothly and cleanly under mild conditions and no side reactions were observed.
Ramazani, Ali,Abdian, Behnaz,Nasrabadi, Fatemeh Zeinali,Shajari, Nahid,Ranjdoost, Zahra Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.11
A simple method has been developed for four-component synthesis of disubstituted 1,3,4-oxadiazoles using (N-isocyanimino)triphenylphosphorane, a primary amine, a carboxylic acid and biacetyl in $CH_2Cl_2$ by the Ugi-4CR/aza-Wittig sequence at room temperature in excellent yields.
Catalyst-free sonosynthesis of highly substituted propanamide derivatives in water
Ramazani, A.,Rouhani, M.,Joo, S.W. Elsevier Science 2016 Ultrasonics sonochemistry Vol.28 No.-
A clean, rapid and energy-efficient approach to catalyst-free one-pot synthesis of highly substituted propanamide derivatives in water was developed utilizing of the ultrasonic irradiation. The method has been successful in achieving the green chemistry objective. A catalyst-free operation, an energy efficient protocol using ultrasound irradiation instead of conventional heating or stirring and use of water as a non-hazardous, inexpensive and readily available solvent in the one-step reaction against sequential reaction steps thus combining the features of both economic and environmental advantages.
Ramazani, Ali,Ahmadi, Yavar,Fattahi, Nadia,Ahankar, Hamideh,Pakzad, Mousa,Aghahosseini, Hamideh,Rezaei, Aram,Fardood, Saeid Taghavi,Joo, Sang Woo Informa UK (TaylorFrancis) 2016 Phosphorus, sulfur, and silicon and the related el Vol.191 No.7
<P>The 1:1 imine intermediate generated by the addition of a primary amine to cyclohexanone trapped by N-isocyaniminotriphenylphosphorane (NICITPP) in the presence of aromatic carboxylic acids and the corresponding iminophosphorane intermediate was formed. Disubstituted 1,3,4-oxadiazole derivatives are formed via intramolecular aza-Wittig reaction of the iminophosphorane intermediate. The reactions were completed in neutral conditions at room temperature (18-26 degrees C). The disubstituted 1,3,4-oxadiazole derivatives were produced in excellent yields. [GRAPHICS]</P>
Crystal structure of 2-[benzyl-(7-oxo-cyclohepta-1,3,5-trienyl)-amino]-N-cyclohexylpropanamide
Ramazani, A.,Joo, S. W.,Amini, I.,Ś,lepokura, K.,Lis, T.,Souldozi, A. Springer Science + Business Media 2015 Journal of structural chemistry Vol.56 No.3
<P>The title compound 2-[benzyl-(7-oxo-cyclohepta-1,3,5-trienyl)-amino]-N-cyclohexylpropanemide is synthesized and studied by the single crystal X-ray diffraction method. The structure of the product was confirmed by IR, H-1 and C-13 NMR spectroscopy, and mass spectrometry. The tropone oxygen atom plays an important role in the solid-state molecular structure stabilization by being involved in intramolecular N-H center dot center dot center dot O and C-H center dot center dot center dot O contacts.</P>
Ramazani, Ali,Nasrabadi, Fatemeh Zeinali,Karimi, Zahra,Rouhani, Morteza Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.8
The 1:1 imine intermediate generated by the addition of primary amine to chloroacetone is trapped by N-isocyaniminotriphenylphosphorane in the presence of (E)-cinnamic acids and the corresponding iminophosphorane intermediate was formed. Disubstituted 1,3,4-oxadiazole derivatives are formed via intramolecular aza-Wittig reaction of the iminophosphorane intermediate. The reactions were completed in neutral conditions at room temperature. The disubstituted 1,3,4-oxadiazole derivatives were produced in excellent yields.