Results 41 to 50 of about 45,058 (347)
Hydrogenative Cyclopropanation and Hydrogenative Metathesis
, 2019 The unusual geminal hydrogenation of a propargyl alcohol derivative with [CpXRuCl] as the catalyst entails formation of pianostool ruthenium carbenes in the first place; these reactive intermediates can be intercepted with tethered alkenes to give either
Biberger, T. +3 more
core +1 more source
Diastereoselective three-component synthesis of beta-amino carbonyl compounds using diazo compounds, boranes, and acyl imines under catalyst-free conditions [PDF]
, 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
Phase Transitions in Hexane Monolayers Physisorbed onto Graphite [PDF]
Phys. Rev. B 71, 155427 (2005), 2004 We report the results of molecular dynamics (MD) simulations of a complete monolayer of hexane physisorbed onto the basal plane of graphite. At low temperatures the system forms a herringbone solid. With increasing temperature, a solid to nematic liquid crystal transition takes place at $T_1 = 138 \pm 2$K followed by another transition at $T_2 = 176 ...
arxiv +1 more source
Molecules, 2007 The asymmetric syntheses of two new spirolactones prepared in optically pure form from L-3-nitrotyrosine are described. The key step, an oxidative spiroannulation, was carried out on the optically active phenols 11a and 11b and afforded the new ...
Thomas W. Scully +3 more
doaj +1 more source
Davis-Beirut reaction: route to thiazolo-, thiazino-, and thiazepino-2H-indazoles. [PDF]
, 2014 Methods for the construction of thiazolo-, thiazino-, and thiazepino-2H-indazoles from o-nitrobenzaldehydes or o-nitrobenzyl bromides and S-trityl-protected 1°-aminothioalkanes are reported.
Farber, Kelli M +2 more
core +2 more sources
Effect of ion hydration on the first-order transition in the sequential wetting of hexane on brine [PDF]
, 2003 In recent experiments, a sequence of changes in the wetting state (`wetting transitions') has been observed upon increasing the temperature in systems consisting of pentane on pure water and of hexane on brine. This sequence of two transitions is brought about by an interplay of short-range and long-range interactions between substrate and adsorbate ...
arxiv +1 more source
Marine Drugs, 2020 Brown alga Bifurcaria bifurcata is a prolific source of bioactive acyclic (linear) diterpenes with high structural diversity. In the continuation of our investigations on Irish brown algae, we undertook an in-depth chemical study on the n-hexanes and ...
Vangelis Smyrniotopoulos +4 more
doaj +1 more source
Jurnal Teknik Kimia dan Lingkungan, 2021 Biji buah alpukat (Persea americana) merupakan sumber limbah biomassa yang dapat dimanfaatkan sebagai sumber energi alternatif. Pada bagian biji alpukat mengandung selulosa, hemiselulosa, lignin, lipid, protein.
Ary Rahmady Pratama +2 more
doaj +1 more source
Synthesis of Simplified Azasordarin Analogs as Potential Antifungal Agents [PDF]
, 2019 A new series of simplified azasordarin analogs was synthesized using as key steps a Diels–Alder reaction to generate a highly substituted bicyclo[2.2.1]heptane core, followed by a subsequent nitrile alkylation.
Dockendorff, Chris, Wu, Yibiao
core +4 more sources
1,3,4-Tri-O-acetyl-2-N-(trifluoroacetyl)-β-l-fucose
Acta Crystallographica Section E, 2014 The title compound, C14H18F3NO8, was produced through conjugation of 1,3,4-tri-O-acetyl-2-azidodeoxy-α,β-l-fucose with trifluoroacetyl chloride in the presence of bis(diphenylphosphino)ethane in tetrahydrofuran at room temperature.
David C. McCutcheon +2 more
doaj +1 more source