Results 31 to 40 of about 146,026 (303)

Lipase catalysed kinetic resolution of racemic 1,2-diols containing a chiral quaternary center [PDF]

open access: yes, 2018
Optically active 1,2-diols are valuable buildings blocks in organic synthesis. In the present paper, a set of racemic 1,2-diols with an ester functional group are prepared, starting from -ketoesters in a three-step procedure with moderate yields.
Gonzalo Calvo, Gonzalo de
core   +2 more sources

Different Reaction Patterns in the Baylis-Hillman Reaction of Aryl Aldehydes with Phenyl Vinyl Ketone, Phenyl Acrylate and Phenyl Thioacrylate

open access: yesMolecules, 2002
In the Baylis-Hillman reaction of aryl aldehydes with phenyl vinyl ketone we have observed exclusive formation of diadducts 4, and that the yields of diadduct can reach 80% with increasing amounts of phenyl vinyl ketone.
Jian-Kang Jiang, Chao-Qun Li, Min Shi
doaj   +1 more source

Additive Gaussian Process Regression for Predictive Design of High‐Performance, Printable Silicones

open access: yesAdvanced Engineering Materials, EarlyView.
A chemistry‐aware design framework for tuning printable polydimethylsiloxane (PDMS) for vat photopolymerization (VPP) is developed using additive Gaussian process (GP) modeling. Polymer network mechanics informs variable groupings, feasible formulation constraints, and interaction variables.
Roxana Carbonell   +3 more
wiley   +1 more source

Asymmetric preparation of antifungal 1-(4 -chlorophenyl)-1-cyclopropyl methanol and 1-(4 -chlorophenyl)-2-phenylethanol. Study of the detoxification mechanism by Botrytis cinerea [PDF]

open access: yes, 2011
Chiral alcohols are important as bioactive compounds or as precursors to such molecules. On the basis of the different antifungal properties of the enantiopure alcohol derivatives of 4-chlorophenyl cyclopropyl ketone and benzyl 4-chlorophenyl ketone ...
Aleu Casatejada, Josefina   +4 more
core   +2 more sources

Metal‐Free Synthesis of 1,3‐Divinylimidazolidin‐2‐One

open access: yesChemistryOpen
A new one‐pot synthesis of 1,3‐divinylimidazolidin‐2‐one (DVI) starting from cheap and commercially available substances, i.e., di(chloroethyl)amine and phosgene or triphosgene was developed.
Sabine Lorenzen   +6 more
doaj   +1 more source

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

open access: yesAdvanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Industrial Sources of Dioxin Poisoning in Mossville, Louisiana: A Report Based on the Government's Own Data [PDF]

open access: yes, 2007
Since 1998, the U.S. Agency for Toxic Substances and Disease Registry (ATSDR) -- which is a division of the Centers for Disease Control -- has conducted an Exposure Investigation of dioxins in Mossville, Louisiana, an historic African American community ...
Wilma Subra
core  

Reactive organoallyl species generated from aryl halides and allene: allylation of alpha,beta-unsaturated aldehydes and cyclic ketones employing Pd/In transmetallation processes [PDF]

open access: yes, 2008
Allylation of α,β-unsaturated aldehydes and cyclic ketones promoted by Pd/In transmetallation processes has been studied. The unsaturated aldehydes underwent regioselective 1,2-addition to afford secondary homoally alcohols.
Anwar   +56 more
core   +2 more sources

X-ray diffraction to probe the kinetics of ice recrystallization inhibition [PDF]

open access: yes, 2020
Understanding the nucleation and growth of ice is crucial in fields ranging from infrastructure maintenance, to the environment, and to preserving biologics in the cold chain.
Fayter, Alice E. R.   +2 more
core   +2 more sources

Synthesis and Antimicrobial Screening of Quinazolone Containing Novel Heterocyclic Schiff Base and Azetidinone by Niementowski Reaction

open access: yesE-Journal of Chemistry, 2005
Several 2-[2-{(4-substitutedbenzylidene)-phenyl}vinyl]-4-oxo-3,4-dihydroquinazolone-6-sulfonicacid 4(a-l) and 2-[2-{4-(3-chloro-4-substituedphenyl-azetidin-2-one)-phenyl}vinyl]-4-oxo-3,4-dihydroqui-nazolone-6-sulfonic acid 5(a-l) were synthesized by ...
A. R. Desai, R. U. Roy, K. R. Desai
doaj   +1 more source

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