Results 21 to 30 of about 329,692 (304)

Diastereoselective three-component synthesis of beta-amino carbonyl compounds using diazo compounds, boranes, and acyl imines under catalyst-free conditions [PDF]

open access: yes, 2014
Diazo compounds, boranes, and acyl imines undergo a three-component Mannich condensation reaction under catalyst-free conditions to give the anti β-amino carbonyl compounds in high diastereoselectivity.
Luan, Yi   +4 more
core   +1 more source

Fe(OTf)3-catalysed Friedel–Crafts reaction of benzenoid arenes with α,β-unsaturated carbonyl compounds: easy access to 1,1-diarylalkanes [PDF]

open access: yesRoyal Society Open Science, 2017
A simple and efficient method for the synthesis of 1,1-diarylalkanes via the Friedel–Crafts-type alkylation reaction of electron-rich arenes with cinnamic acid ester derivatives or chalcones is reported.
Aditya Bhattacharya   +2 more
doaj   +1 more source

Acetone in the Atmosphere of Hong Kong, Abundance, Sources and Photochemical Precursors [PDF]

open access: yes, 2013
Intensive field measurements were carried out at a mountain site and an urban site at the foot of the mountain from September to November 2010 in Hong Kong.
Blake, DR   +6 more
core   +2 more sources

Electrochemically driven desaturation of carbonyl compounds [PDF]

open access: yesNature Chemistry, 2020
Electrochemical techniques have long been heralded for their innate sustainability as efficient methods for achieving redox reactions. Carbonyl desaturation, as a fundamental organic oxidation, is an oft-employed transformation to unlock adjacent reactivity. To date, the most reliable methods for achieving it have relied on transition metals (Pd/Cu) or
Samer Gnaim   +8 more
openaire   +2 more sources

Phosphoranaloga von Aminosäuren und Peptiden: Kettenverlängerung von Carbonylverbindungen

open access: yesCHIMIA, 1982
Synthesis of carbonyl compounds 5 involving the Wittig-Horner reaction of diethyl-1-isocyanoalkylphosphonate 1 with carbonyl compounds 2 and subsequent hydrolysis of the vinyl isocyanides 3 formed is reported.
Janusz Rachoń
doaj   +1 more source

Porous silica spheres as indoor air pollutant scavengers [PDF]

open access: yes, 2010
Porous silica spheres were investigated for their effectiveness in removing typical indoor air pollutants, such as aromatic and carbonyl-containing volatile organic compounds (VOCs), and compared to the commercially available polymer styrene ...
Delaney, Paul   +6 more
core   +2 more sources

Spectral studies of some hydroxy-derivatives of anthraquinones [PDF]

open access: yes, 1970
The u.v., visible, and i.r. spectra of several hydroxy-anthraquinones are discussed and the bands are assigned. These bands are compared with those of anthracene and anthraquinone. The band at 207 nm.
El Ezaby, M. S.   +3 more
core   +1 more source

Selective oxidation of some primary and secondary benzylic alcohols to the corresponding carbonyl compounds with a Cu(III) complex [PDF]

open access: yesJournal of the Serbian Chemical Society, 2005
The selective oxidation of benzylic alcohols to the corresponding carbonyl compounds is described. In alkaline solution, the oxidation reagent potassium tetrasodium diperiodatocuprate(III) dodecahydrate (KNa4[Cu(HIO6)2[12H2O] reacts with primary and ...
Bugarčić Zorica M.   +2 more
doaj   +3 more sources

Reactive carbonyl compounds related uremic toxicity (“carbonyl stress”)

open access: yesKidney International, 2001
Many studies on uremic toxins have focused on enzymatic biochemistry. Recently, attention has turned to nonenzymatic biochemistry, especially progressive and irreversible modifications of proteins. Two different approaches opened the field of irreversible nonenzymatic modifications of proteins in uremia: the advanced glycation end products (AGEs ...
Miyata, Toshio   +3 more
openaire   +2 more sources

Analytical Methods for Atmospheric Carbonyl Compounds: A Review

open access: yesAtmosphere
Atmospheric carbonyl compounds have significant impacts on the atmospheric environment and human health, making the selection of appropriate analytical techniques crucial for accurately detecting these compounds in specific environments.
Xiaoshuai Gao   +10 more
doaj   +1 more source

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