- Nanosilica-bonded N-(propylsulfonyl) piperazine-N-sulfamic acid as recyclable catalyst for synthesis of 1,1′-(arylmethylene) diureas and 1,3,5-triazinane-2,4-dithiones
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Nanosilica-bonded N-(propylsulfonyl) piperazine-N-sulfamic acid was easily prepared by functionalizing silica nanoparticles and characterized by thermogravimetric analysis, scanning electron microscopy, infrared (IR) spectroscopy, elemental analyses, and
- Rezaee, Parizad,Davarpanah, Jamal
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p. 6815 - 6830
(2016/08/25)
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- α-Ureidoalkylation of 1,3-bis(hydroxymethyl)-imidazolidin-2-one
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The α-ureidoalkylation of imidazolidine-2,4-dione, urea, carboxylic acid amides, and sulfonamides has been studied using 1,3-bis(hydroxymethyl)- imidazolidin-2-one as ureidoalkylating agent. Methods have been developed for the synthesis of 1,3-bis(2,4-dioxoimidazolidin-1-ylmethyl)-, 1,3-bis(acetylaminomethyl)-, 1,3-bis(benzoylaminomethyl)-, 1,3- bis(phenylsulfonylaminomethyl)-, and 1,3-bis(p-toluenesulfonylaminomethyl) imidazolidin-2-ones.
- Gazieva,Lozhkin,Kravchenko
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p. 1406 - 1410
(2008/09/19)
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- Kinetics and Mechanism of Reactions of Amides with Formaldehyde
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Kinetics of the reactions of substituted ureas like methylurea, phenylurea, acetamide and benzamide with formaldehyde have been studied, using a TLC method developed for the purpose.The increased reactivity of methylurea towards formaldehyde, as compared to urea, is due to the electron-releasing nature of the methyl group.The reduced reactivity of phenylurea is due to the electron-withdrawing nature of the phenyl group.The reduced reactivity observed in the case of acetamide and benzamide is also explained.
- Nair, B. Raveendran,Francis, Joseph
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p. 159 - 161
(2007/10/02)
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