Results 111 to 120 of about 408,472 (346)

Donor‐Substituted C(sp3)‐Bridged Phosphorus‐Heterotriangulenes as Blue Thermally Activated Delayed Fluorescence Emitters

open access: yesAdvanced Optical Materials, EarlyView.
The newly developed regioselective strategy for the para‐functionalization of C(sp3)‐bridged phosphorus‐centered heterotriangulene delivers a series of donor‐acceptor emitters exhibiting thermally activated delayed fluorescence. The carbazole‐substituted compounds feature a unique combination of high photoluminescence quantum yields up to 75%, deep ...
Maximilian Schöner   +8 more
wiley   +1 more source

Access to Macrocycles with an endo Aryl Ether and an endo Aryl-Aryl Bond, Development and Application

open access: yesCHIMIA, 2011
Macrocyclization methodologies allowing access to macrocycles having an endo aryl ether and an endo aryl–aryl bond, especially those based on an intramolecular SNAr reaction and the Suzuki-Miyaura reaction, are summarized.
Qian Wang, Jieping Zhu
doaj   +1 more source

Design and Utilization of Stable Hydrofluoroolefin‐Based Trifluoropropynyl Surrogate for Sonogashira Coupling

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
A novel methodology for the construction of aromatic and heteroaromatic trifluoropropynyl derivatives has been developed. The new protocol is based on a tandem Sonogashira cross‐coupling reaction between a bench‐stable trifluoropropynyl carbinol reagent, generated from the commercially available and inexpensive hydrofluoroolefin‐1234yf gas, and (hetero)
Emma Bodnár   +3 more
wiley   +1 more source

Chiral Potassium Brønsted Base‐Catalyzed Stereoselective Synthesis of 1,3‐Diols via a Tandem Allylic Isomerization/Asymmetric Aldol–Tishchenko Reaction

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
Chiral potassium base catalysts featuring 1,1´‐bi‐2‐naphthol‐derived chiral crown ethers as ligands promote a tandem allylic isomerization/asymmetric aldol‐Tishchenko reaction of allylic alcohols and aldehydes. This method provides enantioenriched 1,3‐diols with excellent diastereoselectivity and high enantioselectivity, thereby expanding the synthetic
Hiroki Ishikawa, Masahiro Sai
wiley   +1 more source

Offspring DNA methylation of the aryl-hydrocarbon receptor repressor gene is associated with maternal BMI, gestational age, and birth weight [PDF]

open access: bronze, 2015
Heather H. Burris   +11 more
openalex   +1 more source

Exploring the Uncharted Indolizine Chemical Space: Construction of 5‐Acylindolizines via a Domino Aldol–Vinylogous Aldol Process

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
A domino aldol condensation–intramolecular vinylogous aldol condensation process was implemented for the first time to enable access to a wide range of novel 5‐acylated indolizines with a hydrogen, an alkyl, an aryl, or an alkoxy moiety at the C7 site.
Dohui Ku, Sunhee Lee, Ikyon Kim
wiley   +1 more source

Efficient, One-Pot Synthesis of Tetrahydrobenzo[a]xanthen-11-ones and Dibenzo[a,j]xanthenes Using Trichloroacetic Acid as a Solid Heterogeneous Catalyst Under Solvent-Free Conditions

open access: yesE-Journal of Chemistry, 2011
A simple and efficient method have been described for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one derivatives employing a one-pot, three-component reaction of aryl aldehydes, 2-naphthol and dimedone in the presence of ...
Zahed Karimi Jaber   +3 more
doaj   +1 more source

Palladium‐Catalyzed Aryloxycarbonylayion of Aryl Bromides with Phenols Using Inositol Hexaformate as an Efficient CO Source

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
We designed a novel carbon monoxide surrogate inositol hexaformate (HFI) and applied it to the palladium‐catalyzed aryloxycarbonylation of aryl bromides with phenols. HFI liberates six molecules of carbon monoxide, exhibiting a significantly higher efficiency and CO capacity than the conventional formate surrogates.
Zhen‐Wei Liu   +2 more
wiley   +1 more source

Bismuth(III) triflate: an economical and environmentally friendly catalyst for the Nazarov reaction

open access: yesBeilstein Journal of Organic Chemistry
We describe the use of bismuth(III) triflate as an efficient and environmentally friendly catalyst for the Nazarov reaction of aryl vinyl ketones, leading to the synthesis of 3-aryl-2-ethoxycarbonyl-1-indanones and 3-aryl-1-indanones.
Manoel T. Rodrigues Jr.   +10 more
doaj   +1 more source

The aryl hydrocarbon receptor nuclear translocator is an essential regulator of murine hematopoietic stem cell viability [PDF]

open access: bronze, 2015
Bryan L. Krock   +9 more
openalex   +1 more source

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