Results 81 to 90 of about 25,797 (319)

1,3-Dien-5-ynes: Versatile Building Blocks for the Synthesis of Carbo- and Heterocycles [PDF]

open access: yes, 2016
1,3-Dien-5-ynes have been extensively used as starting materials for the synthesis of a wide number of different carbo- and heterocycles. The aim of this review is to give an overview of their utility in organic synthesis, highlighting the variety of ...
Aguilar, Enrique   +3 more
core   +1 more source

Intermolekulare, Enantioselektive Nickel‐Katalysierte Arylierung von Nicht‐Aktivierten C(sp3)–H Bindungen

open access: yesAngewandte Chemie, EarlyView.
Ni: neue Lösung für asymmetrische C(sp3)‐H‐Aktivierung. Die stereoselektive Synthese vollständig kohlenstoffsubstituierter quartärer Stereozentren gelingt durch eine enantioselektive C(sp3)‐H‐Arylierung unter Verwendung eines Ni‐Katalysators auf der Basis eines BINOL‐Derivaten.
Erwan Brunard   +4 more
wiley   +1 more source

Mechanochromic Organic Materials: Molecular Mechanisms and Multidimensional Applications

open access: yesAdvanced Physics Research, EarlyView.
Mechanochromic (MC) organic materials change color in response to mechanical force. This review elucidates the molecular mechanisms (e.g., aggregation‐induced emission, AIE) and explores their multidimensional applications in sensors, anti‐counterfeiting, biomedical devices, and structural health monitoring, providing a roadmap for future smart ...
Xiaozhe Yin   +5 more
wiley   +1 more source

Screening studies of POP levels in fish from selected lakes in the Paz watercourse [PDF]

open access: yes, 2007
Appendix 8/15 of the publication "State of the environment in the Norwegian, Finnish and Russian border area 2007" (The Finnish Environment 6/2007)
Alexeeva, Ludmyla   +11 more
core  

Formal [4 + 1] Cycloadditions of β,β-Diaryl-Substituted ortho-(Alkynyl)styrenes through Gold(I)-Catalyzed Cycloisomerization Reactions [PDF]

open access: yes, 2016
Gold(I)-catalyzed cycloisomerization of β,β-diaryl-o-(alkynyl)- styrenes at 80 °C selectively yields dihydroindeno[2,1-a]indenes in a transformation that encompasses a formal [4 + 1] cycloaddition and takes place through a cascade 5-endo-cyclization ...
Fernández Rodríguez, Manuel A.   +4 more
core   +1 more source

One‐Pot Ruthenium‐Catalyzed Synthesis of Benzyl/Allyl‐Halide Substituted (dihydro)naphthalenes via Radical Benzannulation

open access: yesChemistryEurope, EarlyView.
A one‐pot protocol to synthesize reactive benzyl‐ and allyl‐halide‐substituted (dihydro)naphthalenes from 2,3‐aryl‐1,3‐butadiene substrates and halogenated alkanes has been developed, using [Cp*RuCl(PPh3)2] as the catalyst. Mechanistic studies revealed an atom transfer radical addition and radical benzannulation sequence, followed by HCl elimination ...
Nicole S. van Leeuwen   +9 more
wiley   +1 more source

Dynamics and distribution of bacterial and archaeal communities in oil-contaminated temperate coastal mudflat mesocosms [PDF]

open access: yes, 2015
Mudflats are ecologically important habitats that are susceptible to oil pollution, but intervention is difficult in these fine-grained sediments, and so clean-up usually relies on natural attenuation.
A Fahy   +78 more
core   +1 more source

Modelling and simulation of hydrogen production via natural gas plasma pyrolysis

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Methane pyrolysis simulation model. Abstract Plasma pyrolysis is a cutting‐edge technology that produces hydrogen and solid carbon from methane without emitting carbon dioxide. In this study, we developed a process simulation model in Aspen HYSYS to analyze the behaviour of this technology at the commercial scale.
Muhammad Badrul Islam Chowdhury   +2 more
wiley   +1 more source

Shellfish Tissue Monitoring in Piscataqua Region Estuaries 2014 [PDF]

open access: yes, 2015
Originally conducted by the Gulf of Maine Council on the Marine Environment from 1993 to 2011, the Gulfwatch Program examined trends in the water quality of the Gulf of Maine by monitoring toxic contaminant concentrations in the tissues of shellfish ...
Wood, Matthew A.
core   +1 more source

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