Results 61 to 70 of about 103,808 (305)

An improved synthesis of (2E,4Z)-6-(benzyloxy)-4-bromohexa-2,4-dien-1-ol [PDF]

open access: yes, 2007
An improved synthesis of (2E,4Z)-6-(benzyloxy)-4-bromohexa-2,4-dien-1-ol has been devised. This new route increases the throughput and yield of the diene product by circumventing a low yielding preparation of boronic acid intermediate as well as removing
Clarke, Paul A.   +3 more
core   +1 more source

Incorporating Heavy Atom Effect onto Molecular Rotors for Realizing Exceptionally Photocatalytic Oxidation Reaction under Low‐Temperature Conditions

open access: yesAdvanced Materials Interfaces, EarlyView.
Here, we reported a series of molecular‐rotor‐based photoactivated oxidase mimics, DAPy‐Xm, in which heavy atom incorporation enhances both ROS generation and cold‐adapted property. Among them, DAPy‐Im enables efficient photo‐oxidation of ergosterol and photocatalytic H2O2 production at low temperature.
Barbara Zenabu Anibea   +3 more
wiley   +1 more source

(Poly)Borylated Species as Modern Reactive Groups toward Unusual Synthetic Applications

open access: yesAngewandte Chemie, EarlyView.
In this review, we spotlight recent breakthroughs in α‐polyboron‐substituted carbon‐centered intermediates (carbanion, carbocation, radical, and carbene) and polyborylated alkenes. By bridging fundamental reactivity with the application potential of these extraordinary species, we hope this review will serve as a roadmap for harnessing these unique ...
Nadim Eghbarieh   +5 more
wiley   +2 more sources

Preparation and Diels–Alder/cross coupling reactions of a 2-diethanolaminoboron-substituted 1,3-diene

open access: yesBeilstein Journal of Organic Chemistry, 2009
A 2-diethanolamine boronyl substituted 1,3-diene has been synthesized in high yield and characterized spectroscopically as well as by X-ray crystallography.
Liqiong Wang   +3 more
doaj   +1 more source

Triterpenes from the Mushroom Hypholoma lateritium: Isolation, Structure Determination and Investigation in Bdelloid Rotifer Assays

open access: yesMolecules, 2019
Twelve compounds (1–12) were isolated from the methanol extract of brick cap mushroom (Hypholoma lateritium (Schaeff.) P. Kumm.). The structures of the compounds were elucidated using extensive spectroscopic analyses, including NMR and MS ...
Bayar Chuluunbaatar   +9 more
doaj   +1 more source

8-Methyl-3-methylsulfanyl-8a,8b-dihydro-5H-1-oxa-2,4-diazaacenaphthylene

open access: yesIUCrData, 2021
In the tricyclic title compound, C11H12N2OS, the 2,3,4,5-tetrahydropyridine ring adopts a half-chair conformation. This ring makes dihedral angles of 27.72 (7) and 45.17 (7)°, respectively, with the isoxazole and the cyclohexa-1,3-diene rings while the ...
Akoun Abou   +4 more
doaj   +1 more source

Synthesis of Functionalized Homoallylic Alcohols via a Salt‐Free Three‐Component Nickel‐Catalyzed Coupling Reaction

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
A nickel catalyzed three‐component coupling reaction between an aldehyde, a secondary amine, and butadiene allows a straightforward access to 5‐aminopent‐3‐en‐1‐ol scaffolds according to a salt‐free process. Key steps are oxidative coupling reaction between one aldehyde, one butadiene on a low valent nickel precursor, and the nucleophilic attack of a ...
Anthony Saint Pol   +8 more
wiley   +1 more source

A DFT investigation of Diels-Alder reaction of ethyl propiolate to the cage-annulated hexacyclo[7.5.2.01,6.06,13.08,12.010,14]hexadeca-2,4-diene-7,16-dione [PDF]

open access: yesJournal of the Serbian Chemical Society, 2018
The Diels–Alder (DA) reaction between the cage-annulated diene hexacyclo[7.5.2.01,6.06,13.08,12.010,14]hexadeca-2,4-diene-7,16-dione (HHDD) with a cyclohexa-1,3-diene moiety and ethyl propiolate (EP) dienophile was investigated by the DFT method at the ...
Atalay Abdurrahman, Abbasoglu Riza
doaj   +1 more source

Dien Amalia ilma

open access: yes, 2019
Limbah adalah buangan yang dihasilkan dari suatu proses produksi industri maupun rumah tangga. Limbah buangan terdiri dari anorganik dan organik yang masing-masing berasal dari bahan buatan manusia dan makhluk hidup. Indonesia menjadi negara kedua terbanyak dalam produksi sampah.
openaire   +2 more sources

Triplet Energy Transfer‐Driven Intermolecular [2+2] Photocycloaddition of Acyclic Imines and Indoles: Facile Access to Azetidine‐Fused Indolines

open access: yesAdvanced Science, EarlyView.
An intermolecular aza‐Paternò‐Büchi reaction of indoles and acyclic imines is enabled by visible‐light‐driven triplet energy transfer, providing azetidine‐fused indolines up to 93% yield for 30 examples and providing a novel protocol to access previously inaccessible scaffolds. ABSTRACT Currently, successful examples of the aza‐[2+2] photocycloaddition
Gang Yang   +3 more
wiley   +1 more source

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