Results 21 to 30 of about 169,803 (413)
Oxygen-bearing organic molecules in comet 67P's dusty coma: first evidence for abundant heterocycles [PDF]
A&A 678, A22 (2023), 2023 The puzzling complexity of terrestrial biomolecules is driving the search for complex organic molecules in the Interstellar Medium (ISM) and serves as a motivation for many in situ studies of reservoirs of extraterrestrial organics from meteorites and interplanetary dust particles (IDPs) to comets and asteroids. Comet 67P/Churyumov-Gerasimenko (67P) --
arxiv +1 more source
A Search for Heterocycles in GOTHAM Observations of TMC-1 [PDF]
, 2022 We have conducted an extensive search for nitrogen-, oxygen- and sulfur-bearing heterocycles toward Taurus Molecular Cloud 1 (TMC-1) using the deep, broadband centimeter-wavelength spectral line survey of the region from the GOTHAM large project on the Green Bank Telescope.
arxiv +1 more source
Polar Diels-Alder Reactions using Heterocycles as Electrophiles. Influence of Microwave Irradiation [PDF]
, 2015 In this work we studied a series of polar Diels-Alder reactions using different heterocycles derivatives acting as electrophiles joint to dienes of different nucleophilicity, analyzing the effect of the microwave irradiation in these processes. We employ
Della Rosa, Claudia Daniela +3 more
core +1 more source
How Not to Discover a New Reagent. The Evolution and Chemistry of Woollins' Reagent [PDF]
, 2012 The pathways in research can be complex. This review provides a personal account of the winding scientific and funding road that led to Woollins' reagent.
Woollins, J. Derek
core +1 more source
The Domino Way to Heterocycles [PDF]
ChemInform, 2007 AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Albert Padwa, Scott K. Bur
openaire +4 more sources
Green Processing and Synthesis, 2019 Nature and nanotechnology have not yet achieved a lucid correlation in the field of science but together they have exhibited immense potential towards the advancement and modification in future science and technology.
Fowsiya J. +7 more
doaj +1 more source
RSC Advances, 2020 Nitrogen containing heterocycles are of immense research interest because they are often found as naturally occurring bioactive compounds. The prominence of N-heterocycles makes it vital to develop methods to increase their synthetic efficiencies and ...
M. Henary +5 more
semanticscholar +1 more source
Autoxidation of Heterocyclic Aminals [PDF]
ACS Omega, 2017 The autoxidation reactions of 2-acyl-2,3-dihydroquinazolin-4(1H)-ones 4a and 5a and 2,2'-bis(dihydroquinazolinone) 6a are described. These reactions generate aminyl radicals that undergo β-C-C cleavage, and subsequent reactions of the resulting C-based radicals with O2 lead to diverse products with good selectivity, depending on the structure of the ...
Feng Zhai, Richard F. Jordan
openaire +4 more sources
E-Journal of Chemistry, 2010 The reaction rate of Knoevenagel condensation can be dramatically enhanced by irradiating the reaction mixture containing an aldehyde, active methylene compound, L-proline and chlorobenzene with a commercial microwave oven.
Shubha Jain +3 more
doaj +1 more source
Annual Reports Section "B" (Organic Chemistry), 2009 Recent progress in the synthesis of heterocyclic compounds is presented\ud 2010 offered highlights in pericyclic chemistry, particularly 1,3-dipolar cycloaddition chemistry, asymmetric synthesis, gold catalysis, organocatalysis, hydroamination, C–H activation and multicomponent reactions.
openaire +1 more source