Results 91 to 100 of about 4,172 (223)

1-(3, 4-Dichlorobenzenesulfonyl)-3-Methyl-1H-Imidazolium Chloride: An Efficient Catalyst for the Synthesis of 1, 8-Dioxo-Octahydroxanthenes under Microwave Irradiation [PDF]

open access: yes, 2014
The reaction of 5,5-dimethyl-1,3-cyclohexanedione with various aromatic aldehydes to give corresponding 1,8-dioxo-octahydroxanthenes in aqueous medium has been reported.
Kesturu Venkatarayappa Jagannath, .   +1 more
core  

Lanthanum triflate triggered synthesis of tetrahydroquinazolinone derivatives of N-allyl quinolone and their biological assessment [PDF]

open access: yes, 2012
A series of 24 derivatives of tetrahydroquinazolinone has been synthesized by one-pot cyclocondensation reaction of N-allyl quinolones, cyclic β-diketones and (thio)urea/N-phenylthiourea in presence of lanthanum triflate catalyst.
Jardosh Hardik H., Patel Manish P.
core   +1 more source

Synthesis and antibacterial activity of 2-phenyl-5-aryl-4, 5, 6, 7, 8, 9-hexahydro-1,2.4-triazolo[1,5-A]quinazolines [PDF]

open access: yes, 2013
A method for the synthesis of 2-phenyl-5-aryl-4, 5, 6, 7, 8,9- hexahydrotriazolo[1,5-a] quinazolines was developed.3-Amino-5-phenyl-1,2,4-triazole formed Schiff’s bases with aromatic aldehydes which on treatment with cyclohexanonein the presence of ...
Ain Khan, Misbahul   +4 more
core  

N-Butylpyrrolidinone as a dipolar aprotic solvent for organic synthesis [PDF]

open access: yes, 2016
Dipolar aprotic solvents such as N-methylpyrrolidinone (or 1-methyl-2-pyrrolidone (NMP)) are under increasing pressure from environmental regulation. NMP is a known reproductive toxin and has been placed on the EU “Substances of Very High Concern” list ...
Farmer, Thomas James   +4 more
core   +1 more source

Study of trace elements in BioArena system and in in vivo conditions [PDF]

open access: yes, 2014
The adsorbent layer system is especially suitable for the biological evaluation of different compounds and trace elements as well. Present experiments showed that formaldehyde (HCHO) molecules participate in the antibiotic activity of Cu (II) ion, an ...
Calabrese E. J.   +15 more
core   +1 more source

Synthesis and Molluscicidal Activity of Some Newly Substituted Chromene and Pyrano[2,3-c]pyrazole Derivatives [PDF]

open access: yes, 2008
The arylidene derivatives 3a-f react with 1,3-cyclohexanedioneand dimedone 4a,b to afford the 4-(2- or 3-pyridyl) or 4-pipronyl-chromene derivatives 6a-l.
Abdelrazek, Fathy M.   +2 more
core  

12-(3,4,5-Trimethoxyphenyl)-2,3,4,12-tetrahydro-1H-5-oxatetraphen-1-one: crystal structure and Hirshfeld surface analysis [PDF]

open access: yes, 2016
In the title compound, C26H24O5, the pyran ring has a flattened-boat con­formation, with the 1,4-related ether O and methine C atoms lying 0.1205 (18) and 0.271 (2) Å, respectively, above the least-squares plane involving the doubly bonded C atoms (r.m.s
Iniyavan, P.   +5 more
core   +2 more sources

Synthesis and Characterization of Enamine- And Schiff-Base Metal Complexes [PDF]

open access: yes, 2011
Mentor: Dr. Colin CairnsEnamine- and Schiff-Base metal complexes have shown the potential to be catalysts in oxidation reduction reactions. To model these potential catalytic abilities, acetylacetone and 2-acetyldimedone were used to prepare enamine ...
Denton, Kyle
core   +1 more source

Synthesis of Curcumin Derivatives and Analysis of Their Antitumor Effects in Triple Negative Breast Cancer (TNBC) Cell Lines [PDF]

open access: yes, 2019
We analyzed antitumor effects of a series of curcumin analogues. Some of them were obtained by reaction of substitution involving the two phenolic OH groups of curcumin while the analogues with a substituent at C-4 was prepared following an original ...
Barattucci A   +5 more
core   +1 more source

[Fe(III)(Salen)Cl] Complex as a Catalyst for the Synthesis of 1, 8-Dioxo-Octahydroxanthene Derivatives [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2013
1, 8-Dioxo-octahydroxanthene derivatives have efficiently been synthesized from dimedone and aromatic aldehydes using [Fe(III)(salen)Cl] complex as an efficient and homogeneous catalyst in molten tetrabutyl ammonium bromide.
H. Khabazzadeh   +2 more
doaj  

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