Results 31 to 40 of about 66,905 (286)

Application of olefin metathesis in the synthesis of functionalized polyhedral oligomeric silsesquioxanes (POSS) and POSS-containing polymeric materials

open access: yesBeilstein Journal of Organic Chemistry, 2019
This mini-review summarizes the applications of olefin metathesis in synthesis and functionalization of polyhedral oligomeric silsesquioxanes (POSS) and POSS-containing polymeric materials.
Patrycja Żak, Cezary Pietraszuk
doaj   +1 more source

Where r you going? A typology of long-distance metathesis of liquids

open access: yesIsogloss, 2022
This paper offers a typological analysis of the diachronic phenomena of long-distance metathesis of liquids that thrive in the history of several Romance languages.
Eirini Apostolopoulou
doaj   +1 more source

Recent applications of ring-rearrangement metathesis in organic synthesis

open access: yesBeilstein Journal of Organic Chemistry, 2015
Ring-rearrangement metathesis (RRM) involves multiple metathesis processes such as ring-opening metathesis (ROM)/ring-closing metathesis (RCM) in a one-pot operation to generate complex targets.
Sambasivarao Kotha   +4 more
doaj   +1 more source

Ring-closing metathesis of prochiral oxaenediynes to racemic 4-alkenyl-2-alkynyl-3,6-dihydro-2H-pyrans

open access: yesBeilstein Journal of Organic Chemistry, 2020
The prochiral 4-(allyloxy)hepta-1,6-diynes, optionally modified in the positions 1 and 7 with an alkyl or ester group, undergo a chemoselective ring-closing enyne metathesis yielding racemic 4-alkenyl-2-alkynyl-3,6-dihydro-2H-pyrans.
Viola Kolaříková   +3 more
doaj   +1 more source

A Review on Olefin Metathesis Reactions as a Green Method for the Synthesis of Organic Compounds

open access: yesJournal of Chemistry, 2021
Olefin metathesis is a metal-mediated C-C bond exchange by which the two fragments within the olefin precursor are redistributed as a result of breaking the double bond to obtain a new product. Currently, most of the synthetic organic compounds, polymers,
Atitegeb Abera Tsedalu
doaj   +1 more source

Low Catalyst Loadings in Olefin Metathesis: Synthesis of Nitrogen Heterocycles by Ring-Closing Metathesis [PDF]

open access: yes, 2010
A series of ruthenium catalysts have been screened under ring-closing metathesis (RCM) conditions to produce five-, six-, and seven-membered carbamate-protected cyclic amines. Many of these catalysts demonstrated excellent RCM activity and yields with as
Champagne, Timothy M.   +8 more
core   +2 more sources

Merging Biocatalysis and Chemocatalysis in Flow: State‐of‐the‐Art and Future Directions for Sustainable Synthesis

open access: yesAngewandte Chemie, EarlyView.
This review highlights recent advances in integrating biocatalysis and chemocatalysis in continuous flow to create streamlined, sustainable processes. It examines chemo‐enzymatic cascades combining at least one enzymatic and one chemical step, discusses challenges such as enzyme immobilization, leaching, and reactor clogging, and presents solutions ...
Petros Siasiaridis   +2 more
wiley   +2 more sources

Relay cross metathesis reactions of vinylphosphonates

open access: yesBeilstein Journal of Organic Chemistry, 2014
Dimethyl (β-substituted) vinylphosphonates do not readily undergo cross metathesis reactions with Grubbs catalyst and terminal alkenes. However, the corresponding mono- or diallyl vinylphosphonate esters undergo facile cross metathesis reactions.
Raj K. Malla   +2 more
doaj   +1 more source

The Effects of Social Variables of Age, Education and Gender on Metathesis Based on Variationist Sociolinguistics: A Case Study ‘Chokla’ in Hawrami Kurdish

open access: yesپژوهشنامه ادبیات کردی, 2023
This research report presents a quantitative investigation into the impact of social variables including age, education and gender on a specific phonological variation (Metathesis in word [tʃoklæ]) in the Hawrami language, specifically the Paveh dialect.
Nadia Safiee   +2 more
doaj   +1 more source

Application of Transition Metal Catalysis to Small Molecule Synthesis [PDF]

open access: yes, 2006
Over the past decade, transition metal catalysis has developed into a new field in organic synthesis, enabling numerous synthetic transformations that were previously not feasible.
Morrill, Christie
core   +1 more source

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