81829-57-4Relevant academic research and scientific papers
Efficient and green synthesis of 4H-pyran derivatives under ultrasound irradiation in the presence of K2CO3 supported on acidic montmorillonite
Pham, Dung Duc,Vo-Thanh, Giang,Le, Thach Ngoc
, p. 1684 - 1691 (2017/09/08)
Acid-treated montmorillonite coating with K2CO3 is used as a catalyst for an efficient, rapid, one-pot synthesis of 4H-pyran derivatives in good yield under ultrasonic irradiation. The catalyst is environmentally benign, easy handlin
Diethylene glycol-bis(3-methylimidazolium) dihydroxide as a dicationic ionic liquid catalyst for the synthesis of 4H-pyrane derivatives in aqueous medium
Niknam, Khodabakhsh,Khataminejad, Mohsen,Zeyaei, Fariba
supporting information, p. 361 - 365 (2016/01/12)
Diethylene glycol-bis(3-methylimidazolium) dihydroxide [DiEG(mim)2][OH]2 was prepared by the reaction between sodium hydroxide and diethylene glycol-bis(3-methylimidazolium) dibromide in aqueous ethanol at room temperature. This soli
Efficient and expeditious synthesis of pyrano-pyrimidines, multi-substituted γ-pyrans, and their antioxidant activity
El-Bayouki, Khairy A. M.,Basyouni, Wahid M.,Khatab, Tamer K.,El-Basyoni, Fakhry A.,Hamed, Ahmed R.,Mostafa, Eslam A.
, p. 106 - 115 (2014/02/14)
An efficient, expeditious catalytic route for the synthesis of ethyl 6-amino-5-cyano-2-methyl-4-aryl-4H-pyran-3-carboxylates 2 was achieved via a three-component, one-pot reaction of malononitrile, ethyl acetoacetate, and various aromatic aldehydes in wat
Silica-bonded N-propylpiperazine sodium n-propionate as recyclable catalyst for synthesis of 4H-pyran derivatives
Niknam, Khodabakhsh,Borazjani, Nassim,Rashidian, Reza,Jamali, Abbas
, p. 2245 - 2254 (2014/01/06)
Silica-bonded N-propylpiperazine sodium n-propionate (SBPPSP) was found to act as an efficient solid base for the preparation of a series of 4H-benzo[b]pyran derivatives. SBPPSP was used as a recyclable heterogeneous solid base catalyst for the synthesis
ZnO/MgO Containing ZnO Nanoparticles as a Highly Effective Heterogeneous Base Catalyst for the Synthesis of 4H-Pyrans and Coumarins in [bmim]BF 4
Valizadeh,Azimi
experimental part, p. 123 - 130 (2012/01/03)
4H-Pyrans and coumarins were synthesized through one-pot reactions using ZnO/MgO solid sample containing ZnO nanoparticles as an efficient reusable catalyst in ionic liquid, [bmim]BF4. The catalyst is inexpensive and readily available, stable and storable
CYCLIZATION REACTIONS OF NITRILES. REACTION OF ARYLIDENEMALONONITRILES WITH 1,3-DICARBONYL COMPOUNDS
Sharanin, Yu. A.,Promonenkov, V. K.,Sharanina, L. G.
, p. 544 - 548 (2007/10/02)
The reaction of 1,3-dicarbonyl compounds with arylidene derivatives of malononitrile and ethyl cyanoacetate leads to the formation of substituted 2-amino-4H-pyrans.In the case of 1,1,1-trifluoro-3-(2-thenoyl)acetone acid cleavage of the Michael adduct occurs, and this leads to 2-aryl-3-(2-thenoyl)-1,1-dicyanopropanes. 1,3-Indanedione reacts by exchange of the methylene components and gives the corresponding 2-arylidene-1,3-indanediones.
