Results 31 to 40 of about 1,240 (135)

Rhodium-catalyzed one-pot hydroformylation–cyclization of allylbenzene derivatives: Simple and efficient route to 5,6-dihydronaphthalenes

open access: yesCatalysis Communications, 2010
Abstract The one-pot hydroformylation–cyclization of allylbenzene derivatives by the catalyst system Rh(CO) 2 acac/ultranox626/CO/H 2 /CH 2 Cl 2 led chemoselectively to 5,6-dihydronaphthalene derivatives 5a–d in good yields. The addition of a catalytic amount of H 3 PO 4 enhanced in situ the cyclization process via the nucleophilic attack on the ...
Mouheddin Alhaffar   +2 more
openaire   +1 more source

Study on the Acid⁃Catalyzed Cyclization Reaction of Allylbenzenes and Tetrazine

open access: yesShiyou huagong gaodeng xuexiao xuebao
Indeno[1,2⁃d]pyridazine derivatives have wide applications in pesticides,pharmaceuticals,and other fields due to their excellent biological activities.Therefore,the development of rapid and efficient synthetic methods for these compounds has attracted ...
Wenqing LIU, He WANG, Xin WANG, Lei LI
doaj   +1 more source

Ambient Hydrocarbonylation of Olefins Enabled by Visible‐Light

open access: yesAdvanced Science, EarlyView.
A novel photo‐induced methodology for hydrocarbonylation has been established, resolving the inherent conflicts between competitive olefin and CO insertion in traditional methods that necessitate harsh conditions. Accordingly, an efficient and versatile hydrocarbonylation of olefins enabled by visible‐light irradiation under ambient conditions has been
Hongchi Liu, Tianze Zhang, Hanmin Huang
wiley   +1 more source

Novel materials based on functionalised silsesquioxanes [PDF]

open access: yes, 2001
The functionalisation of silsesquioxanes results in materials with novel physical properties. A series of compounds has been coupled with silsesquioxanes [HSiO3/2]8 and [SiO3/2]8 [OSi(CH3)2H]8 and the properties of the products investigated.
Hardy, Julie
core   +1 more source

Z-Selective Monothiolate Ruthenium Indenylidene Olefin Metathesis Catalysts [PDF]

open access: yes, 2020
Ru-alkylidenes bearing sterically demanding arylthiolate ligands (SAr) constitute one of only two classes of catalyst that are Z-selective in metathesis of 1-alkenes.
Ekeli, Jonas Brattebø   +5 more
core   +1 more source

Bio‐Based Epoxy Resins from Estragole: Achieving High Glass Transition Temperatures Comparable to DGEBA and Simultaneously Low Viscosities

open access: yesMacromolecular Materials and Engineering, EarlyView.
Two novel bio‐based epoxy monomers, diglycidyl‐4‐allylphenol (DG‐4A) and triglycidyl‐diallylphenol (TG‐DA), derived from estragole (92% and 72% bio‐content), were synthesized and cured with isophorone diamin (IPDA) and 4,4´‐diaminodiphenyl sulfone (DDS). The resins show high Tgs, with DG‐4A reaching and TG‐DA exceeding DGEBA‐based systems. These resins
Florian Bauer   +4 more
wiley   +1 more source

Cobalt‐Salen Catalysed Hydration of Alkenes With Water: A Complementary Ionic Approach to the Mukaiyama Hydration

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 5, 3 March 2026.
A cobalt‐salen catalysed hydration of olefins with water is reported, resulting in Markovnikov alcohol products. The reaction proceeds rapidly under mild conditions and exhibits excellent functional group tolerance, supporting a wide range of styrenyl and non‐activated alkenes.
David G. Groves   +3 more
wiley   +1 more source

Nucleophilic Germylation of Stable π Bonds via Ge─Ge Bond Heterolysis

open access: yesAngewandte Chemie, Volume 137, Issue 28, July 7, 2025.
A thermodynamically controlled nucleophilic germylation of stable π bonds was achieved by germyl anion generated in situ via heterolytic cleavage of the Ge─Ge bond in the presence of KOtBu. This methodology enables unprecedented multiple germylation of alkynes and internally selective germylation of alkenes, affording 1‐alkyl‐1‐germylalkanes, 1,1 ...
Kyoka Sakamoto   +3 more
wiley   +2 more sources

Harnessing the Antibacterial, Anti-Diabetic and Anti-Carcinogenic Properties of Ocimum sanctum Linn (Tulsi)

open access: yesPlants
Ocimum sanctum Linn (O. sanctum L.), commonly known as Holy Basil or Tulsi, is a fragrant herbaceous plant belonging to the Lamiaceae family. This plant is widely cultivated and found in north-central parts of India, several Arab countries, West Africa ...
Rakesh Arya   +9 more
doaj   +1 more source

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