Results 191 to 200 of about 200,870 (399)

Friedel–Crafts hydroxyalkylation of indoles mediated by trimethylsilyl trifluoromethanesulfonate [PDF]

open access: yes, 2015
Indoles and N-alkylindoles undergo Friedel–Crafts addition to aldehydes in the presence of trimethylsilyl trifluoromethanesulfonate and a trialkylamine to produce 3-(1- silyloxyalkyl)indoles.
Downey, C. Wade   +2 more
core   +1 more source

Size‐dependent Stability and Luminescence Property in Organic Aggregates

open access: yesAggregate, EarlyView.
This work explores the critical sizes of stable aggregates and their bright luminescence for helical hexaphenylsilole and planar 3‐(2‐cyano‐2‐phenylethenyl‐Z)‐NH‐indole aggregation‐induced emission luminogens, providing dynamic insights into the aggregation‐induced emission (AIE) mechanism and invaluable guidance for optimizing the size of AIE‐based ...
Junfang Yang   +4 more
wiley   +1 more source

Toward Autonomous Self‐Healing in Soft Robotics: A Review and Perspective for Future Research

open access: yesAdvanced Intelligent Systems, EarlyView.
In this article, five different phases (damage detection, cleaning, damage closure, material healing, and healing assessment) are investigated to have an autonomous self‐healing at the system level with the focus on soft robotics. It delves into the importance of each phase, why and where they matter, and reviews relevant technologies that enable ...
Seyedreza Kashef Tabrizian   +2 more
wiley   +1 more source

Chemical Bonds Containing Hydrogen: Choices for Hydrogen Carriers and Catalysts

open access: yesAngewandte Chemie, EarlyView.
Hydrogen carriers utilizing B─H, C─H, N─H, and O─H bonds are evaluated for their potential in hydrogen storage and release. Key candidates such as methanol, ammonia, and formic acid are examined with a focus on critical factors influencing performance, including the nature of chemical bonds, reaction pathways, and catalytic processes.
James Cashel   +9 more
wiley   +2 more sources

Reaction of aromatic azides with strong acids: formation of fused nitrogen heterocycles and arylamines

open access: yesJournal of the Brazilian Chemical Society, 1999
We describe in this paper the action of trifluoroacetic acid, trifluoromethanesulfonic acid and aluminum chloride upon ortho-substituted aryl azides to form indoles, azepines and arylamines in good yields.
Carvalho Marcia de   +2 more
doaj  

A Novel Merocyanine Derivative for Probing Polarity at Cubosome Interfaces

open access: yesAsian Journal of Organic Chemistry, EarlyView.
This study develops a synthetic route to C10SP, a polarity‐sensitive sensor embedded in phytantriol‐based cubosomes. Strategic steps included tertiary amine‐mediated amidation to covalently attach a hydrophobic tail and controlled nitrogen methylation to form the iminium moiety within the indolenine scaffold.
Marcelo J. Eberhardt   +3 more
wiley   +1 more source

Approach Toward Stereoselective α‐Arylation by Pd/Cu‐Catalyzed Arylboration of Electron Deficient Alkenes

open access: yesAngewandte Chemie, EarlyView.
A strategy for the α‐arylation of carbonyl compounds is presented. The Cu‐ and Pd‐catalyzed reaction involves 1,2‐arylboration of electron deficient alkenes and proceeds with high levels of selectivity. The mechanism is addressed and suggests that a boron ligated enolate is responsible for high selectivity.
Suman Das   +4 more
wiley   +2 more sources

Silylation of Aryl and Alkyl Chlorides by a Seven‐Membered Dialkoxysilyl Group Si(pan)Me via an In Situ Generated Silylpotassium

open access: yesAngewandte Chemie, EarlyView.
This study reveals a facile silylation protocol that enables the delivery of a stable and activatable dioxasilepanyl group, Si(pan)Me, to aryl and alkyl chlorides. Of note is the X‐ray structure of 18‐C‐6·K–Si(pan)Me, which elucidates a pivotal silylpotassium intermediate.
Kenshiro Hitoshio   +2 more
wiley   +2 more sources

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