- H-β-zeolite catalyzed transamidation of carboxamides, phthalimide, formamides and thioamides with amines under neat conditions
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Efficient transamidation of unactivated carboxamides, phthalimides, formamides and thioamides with amines under solvent-free conditions using H-β-zeolite as a green and recyclable heterogeneous catalyst is described. Easy work up, high purity of the products, recyclability and environmentally-friendly nature of the catalyst are the attractive features of the present methodology. This is the first report for the transamidation of thioamides under heterogeneous conditions.
- Rao, Sadu Nageswara,Chandra Mohan, Darapaneni,Adimurthy, Subbarayappa
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p. 95313 - 95317
(2015/11/24)
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- Synthesis and application of a new fluorous-tagged ammonia equivalent
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A novel fluorous-tagged ammonia equivalent has been developed. It is based on a nitrogen-oxygen bond, which can be cleaved in a traceless manner by a molybdenum complex or samarium diiodide. The application in the synthesis of ureas, amides, sulfonamides, and carbamates is described. The scope of the fluo-rous N-O linker is exemplified by the synthesis of itopride, a drug used for the treatment of functional dyspepsia. Itopride was synthesized with the aid of fluorous purification methods and the product was isolated in good overall yield, with high purity.
- Nielsen, Simon D.,Smith, Garrick,Begtrup, Mikael,Kristensen, Jesper L.
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supporting information; experimental part
p. 4557 - 4566
(2010/08/20)
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- Nafion-catalyzed microwave-assisted Ritter reaction: an atom-economic solvent-free synthesis of amides
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An atom-economic solvent-free synthesis of amides by the Ritter reaction of alcohols and nitriles under microwave irradiation is reported. This green protocol is catalyzed by solid-supported NafionNR50 with improved efficiency and reduced waste production.
- Polshettiwar, Vivek,Varma, Rajender S.
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p. 2661 - 2664
(2008/09/19)
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- 2-Acylpyridazin-3-ones: Novel mild and chemoselective acylating agents for amines
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2-Acyl-4,5-dichloropyridazin-3-ones served as excellent novel N-acylating reagents for amines under neutral conditions in organic solvent. They are convenient, chemoselective and easy to handle stable N-acylating reagents of amines.
- Kang, Young-Jin,Chung, Hyun-A,Kim, Jeum-Jong,Yoon, Yong-Jin
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p. 733 - 738
(2007/10/03)
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