Results 81 to 90 of about 22,917 (286)
Bro̷nsted Acid-Catalyzed Reduction of Furans
Bioderived furans play a pivotal role in advancing defossilized chemical pathways. The complete reduction of furans currently relies on impractical metal-catalyzed hydrogenations at high pressures and temperatures.
Frank, N., List, B., Leutzsch, M.
core +1 more source
Die Aza‐Büchner–Curtius–Schlotterbeck‐Reaktion: Selektive Bildung Quartärer Kohlenstoffzentren
Angewandte Chemie, EarlyView.Wir stellen die Aza‐Büchner–Curtius–Schlotterbeck‐(ABCS)‐Reaktion vor: eine milde, katalysatorfreie Methode zur Homologierung von Aryliminen. Im Gegensatz zum traditionellen BCS‐Mechanismus durchläuft das Diazo‐Intermediat eine selektive C─C‐Insertion zur Bildung eines quartären Zentrums.
Simon O. Angerer +6 more
wiley +1 more source
A Diels–Alder probe for discovery of natural products containing furan moieties
Beilstein Journal of Organic ChemistryNatural products (NPs) are fantastic sources of inspiration for novel pharmaceuticals, oftentimes showing unique bioactivity against interesting targets.
Alyssa S. Eggly +5 more
doaj +1 more source
Clean Air Journal, 2016 Dioxins and furans are toxic chemicals. A draft report released for public comment in September 1994 by the US Environmental Protection Agency clearly describes dioxin as a serious public health threat.
D.L. Posthumus, G.B. Woollatt
doaj +1 more source
Gold(I)-catalyzed formation of furans from γ-acyloxyalkynyl ketones
Beilstein Journal of Organic Chemistry, 2013 Various γ-acyloxyalkynyl ketones were efficiently converted into highly substituted furans with 2.5 mol % of triflimide (triphenylphosphine)gold(I) as a catalyst in dichloroethane at 70 °C.
Marie Hoffmann +4 more
doaj +1 more source
, 1994 4-Aryl-3-substituted furans IIIa - IIId were prepared by Diels Alder reaction of 4-phenyloxazole (I) with compounds IIa - IId, containing an activated triple bond, and subsequent thermal decomposition of the cycloadduct.
Jarmila Štetinová +4 more
core +1 more source
Novel carbocationic rearrangements of 1-styrylpropargyl alcohols
Beilstein Journal of Organic Chemistry, 2015 The dehydration and subsequent cyclization reactions of 1-styrylpropargyl alcohols was examined. In the course of these studies, numerous scaffolds were synthesized, including a furan, a cyclopentenone, an acyclic enone and even a naphthalenone.
Christine Basmadjian +2 more
doaj +1 more source
Changes during the extrusion of semolina in mixture with sugars
Czech Journal of Food Sciences, 2001 Wheat semolina and its mixtures with 5% glucose, fructose of sucrose were processed in a sigle screw extruder at the maximum temperature of 140°C and the processing time of 30 s.
A. Farouk Mansour +3 more
doaj +1 more source
Dioxins and furans in Rillito, Arizona [PDF]
, 2006 : Concerns of Rillito citizens about emissions of dioxins and furans from the Arizona Portland Cement Plant and stack testing at APCC led to an ambient air monitoring program conducted in 2004 - 2005.
core
Volatile Composition of Smoked and Non-Smoked Iranian Rice
Foods, 2016 In this work, the volatile profiles of smoked and non-smoked Iranian rice were identified, and their relative abundance was calculated and compared. Headspace solid-phase microextraction together with gas chromatography-mass spectrometry (SPME-GC-MS ...
Leontina Lipan +4 more
doaj +1 more source