Organic chemistry
Mohammad Reza Poor Heravi; Hassan Karami; Bagher Mohammadi; Vahid Azizkhani
Abstract
An efficient and convenient synthesis of novel tetrahydrobenzo[c]acridin-8(7H)-one derivatives is described using the electrogenerated anion of acetonitriles as the base in the presence of tetrabutylammonium fluoride as an effective supporting electrolyte in a one-pot, three-component condensation of ...
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An efficient and convenient synthesis of novel tetrahydrobenzo[c]acridin-8(7H)-one derivatives is described using the electrogenerated anion of acetonitriles as the base in the presence of tetrabutylammonium fluoride as an effective supporting electrolyte in a one-pot, three-component condensation of aromatic aldehyde, dimedone and 1-naphthyl amine. The reaction is carried out in an undivided cell containing an iron cathode and a graphite anode under a constant current density of 5 mA/cm2 (I=20 mA, electrode surface=5 cm2) in CH3CN at room temperature was found to be optimum for the electrochemically induced chain process and resulted in the highest yield. An efficient and convenient synthesis of novel tetrahydrobenzo[c]acridin-8(7H)-one derivatives is described using the electrogenerated anion of acetonitriles as the base in the presence of tetrabutylammonium fluoride as an effective supporting electrolyte in a one-pot, three-component condensation of aromatic aldehyde, dimedone and 1-naphthyl amine. The reaction is carried out in an undivided cell containing an iron cathode and a graphite anode under a constant current density of 5 mA/cm2 (I=20 mA, electrode surface=5 cm2) in CH3CN at room temperature was found to be optimum for the electrochemically induced chain process and resulted in the highest yield.
![Electrocatalytic multicomponent assembling of aldehydes, dimedone and 1-naphthylamine for synthesis of novel tetrahydrobenzo[c]acridin-8(7H)-one derivatives](data/icc/coversheet/781508583888.jpg)
Nanochemistry
Isak Rajjak Shaikh; Noor Mahmad Nabisaheb Maldar; Caroline Sunyong Lee; Rajendra Charandeo Pawar; Hyung-Ho Park; Uzma Khwaja-Husain Bangi
Volume 6, Issue 1, pp. 1-108, Serial No. 18 , January 2018, , Pages 19-29
Abstract
Multiwalled Carbon Nanotube (MWCNT) reinforced silica aerogel was synthesized in a very simple and cost effective sol - gel method. The process was followed by ambient pressure drying, and then the aerogel material was characterized by XRD, BET, SEM, EDX and FT-IR. 2.3 x 10-3 wt% MWCNTs were successfully ...
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Multiwalled Carbon Nanotube (MWCNT) reinforced silica aerogel was synthesized in a very simple and cost effective sol - gel method. The process was followed by ambient pressure drying, and then the aerogel material was characterized by XRD, BET, SEM, EDX and FT-IR. 2.3 x 10-3 wt% MWCNTs were successfully incorporated in sodium silicate based silica aerogel. This metal-free nanocomposite catalyzed a four component organic reaction among 4-hydroxy coumarin, benzaldehyde, phenyl hydrazine, and ethyl acetoacetate for synthesizing medicinally important benzylpyrazolyl coumarin at room temperature. The MWCNT/silica aerogel composite material having easy accessible active sites and high catalytic activity was easily recovered and reused. The aerogel composite when impregnated with ceria offered very efficient and selective reaction methodology.
Organic chemistry
Hojat Veisi; Abbas Maleki; Yasaman Farokhzad
Volume 5, Issue 2, pp. 121-236, Serial No. 15 , April 2017, , Pages 217-226
Abstract
An electroorganic reaction for the synthesis of 7-amino-2, 4-dioxo-5-phenyl-2,3,4,5-tetrahydro-1H-pyrano[2, 3-d] pyrimidine-6-carbonitrile and ethyl-7-amino-2, 4-dioxo-5-phenyl-2,3,4,5-tetrahydro-1H-pyrano[2, 3-d] pyrimidine-6-carboxylate derivatives are described, using an electrogenerated base of the ...
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An electroorganic reaction for the synthesis of 7-amino-2, 4-dioxo-5-phenyl-2,3,4,5-tetrahydro-1H-pyrano[2, 3-d] pyrimidine-6-carbonitrile and ethyl-7-amino-2, 4-dioxo-5-phenyl-2,3,4,5-tetrahydro-1H-pyrano[2, 3-d] pyrimidine-6-carboxylate derivatives are described, using an electrogenerated base of the anion of malonitrile or ethylcyanoacetate. This one-pot, three-component condensation of an aromatic aldehyde, barbituric acid and malonitrile or ethylcyanoacetate takes place in ethanol in an undivided cell in the presence of tetrabutylammonium perchlorate as an electrolyte under mild conditions. This method has the advantages of high yields, wide application and employs an environmentally benign procedure.An electroorganic reaction for the synthesis of 7-amino-2, 4-dioxo-5-phenyl-2,3,4,5-tetrahydro-1H-pyrano[2, 3-d] pyrimidine-6-carbonitrile and ethyl-7-amino-2, 4-dioxo-5-phenyl-2,3,4,5-tetrahydro-1H-pyrano[2, 3-d] pyrimidine-6-carboxylate derivatives are described, using an electrogenerated base of the anion of malonitrile or ethylcyanoacetate. This one-pot, three-component condensation of an aromatic aldehyde, barbituric acid and malonitrile or ethylcyanoacetate takes place in ethanol in an undivided cell in the presence of tetrabutylammonium perchlorate as an electrolyte under mild conditions. This method has the advantages of high yields, wide application and employs an environmentally benign procedure.
![Electron as potential and green catalyst in the multicomponent synthesis of pyrano [2, 3-d] pyrimidine derivatives](data/icc/coversheet/121465984392.png)
![Electrocatalytic multicomponent assembling of aldehydes, dimedone and 1-naphthylamine for synthesis of novel tetrahydrobenzo[c]acridin-8(7H)-one derivatives](javascript:loadModal('Electrocatalytic multicomponent assembling of alde ... ', 'data/icc/coversheet/781508583888.jpg'))
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![Electron as potential and green catalyst in the multicomponent synthesis of pyrano [2, 3-d] pyrimidine derivatives](javascript:loadModal('Electron as potential and green catalyst in the mu ... ', 'data/icc/coversheet/121465984392.png'))