The solvent free preparation of beta-amino esters alpha,beta-unsaturated ketones and esters with domestic microwave oven
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منابع مشابه
The Solvent Free Preparation of β-Amino Esters α,β-Unsaturated Ketones and Esters with Domestic Microwave Oven
Uma série de cetonas e ésteres α,β-insaturados β-amino ésteres, 4a-h e 6a-d, derivados de α-amino ácidos foi obtida a partir dos cloridratos dos α-amino ésteres 2a-d e dos compostos 1,3-dicarbonílicos 3a,b e 5 em presença de trietilamina. Estes compostos foram preparados empregando energia de microondas, sem uso de solvente, utilizando como suporte sólido K-10 ou KSF e também foram efetuadas re...
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Um método simples e eficiente foi desenvolvido para a hidrocalcogenação de alquinos contendo um aceptor de Michael (éster, cetona e nitrila) com ânions fenilcalcogenolatos gerados in situ a partir do respectivo dicalcogeneto de difenila (Se, Te, S), usando hidreto de boro e sódio suportado em alumina e meio livre de solvente. Este método é geral e permite a obtenção de ésteres, cetonas e nitril...
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< p>In this communication, we have reported that the Pd(OAc)2–Et3SiH-DMF system promotes the microwave-assisted chemoselective reduction of aryl α,β-unsaturated esters in good yields. The protocol affords a convenient reduction of aryl-conjugated double bonds even in presence of other functional groups like esters, phenols, and ethers.
متن کاملSolvent-free preparation of ionic liquids using a household microwave oven*
An efficient solventless protocol for the preparation of a wide variety of ionic liquids is described, which requires a simple exposure of admixed 1-methylimidazole and alkyl halides to microwave irradiation in open glass containers. The details of this clean process using a common household microwave oven, which exploits the newer inverter technology system for better power attenuation, are de...
متن کاملOne-pot preparation of chiral beta-amino esters by rhodium-catalyzed three-components coupling reaction.
Chiral beta-amino esters are synthesized in one-pot from three components, amines, aldehydes, and ethyl bromoacetate, under the rhodium-catalyzed Reformatsky-type reaction condition, where complete diastereoselection is achieved in the nucleophilic addition step of ethyl bromoacetate to the imines prepared in
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ژورنال
عنوان ژورنال: Journal of the Brazilian Chemical Society
سال: 2006
ISSN: 0103-5053
DOI: 10.1590/s0103-50532006000100026