Results 121 to 130 of about 629,880 (409)

α(δ')-Michael Addition of Alkyl Amines to Dimethyl (E)-hex-2-en-4-ynedioate: Synthesis of α,β-Dehydroamino Acid Derivatives

open access: yesMolecules, 2013
The direct nucleophilic addition of alkyl amines to the α(δ')-carbon atom of dimethyl (E)-hex-2-en-4-ynedioate to generate α,β-dehydroamino acid derivatives is reported.
Jie-Cheng Deng   +2 more
doaj   +1 more source

Process for the preparation of fluorine containing crosslinked elastomeric polytriazine and product so produced [PDF]

open access: yes, 1980
Crosslinking elastomeric polytriazines are prepared by a 4 step procedure which consists of (1) forming a poly(imidoylamidine) by the reaction, under reflux conditions, of anhydrous ammonia with certain perfluorinated alkyl or alkylether dinitriles; (2 ...
Korus, R. A., Rosser, R. W.
core   +1 more source

Relative reactivities of alkenes toward the diphenylmethyl cation [PDF]

open access: yes, 1983
The relative reactivities of alkyl and phenyl substituted alkenes toward diphenylmethyl chloride/ZnCl2/Et2O in dichloromethane at −78°C have been determined by competition experiments.
Allen   +21 more
core   +1 more source

Oxygen Defect Engineering of Hexagonal Perovskite Oxides to Boost Catalytic Performance for Aerobic Oxidation of Sulfides to Sulfones

open access: yesAdvanced Functional Materials, EarlyView.
Ru‐substituted hexagonal perovskite SrMnO3, featuring face‐shared oxygen species, is designed as an effective heterogeneous catalyst for the aerobic oxidation of sulfides. The catalyst demonstrates high selectivity to sulfones (>99%) under mild reaction conditions (≥30 °C). Ru substitution promotes oxygen vacancy formation of face‐shared oxygen species
Keiju Wachi   +5 more
wiley   +1 more source

Irradiation-Induced Heck Reaction of Unactivated Alkyl Halides at Room Temperature.

open access: yesJournal of the American Chemical Society, 2017
The palladium-catalyzed Mizoroki-Heck reaction is arguably one of the most significant carbon-carbon bond-construction reactions to be discovered in the last 50 years, with a tremendous number of applications in the production of chemicals.
Guangzu Wang   +3 more
semanticscholar   +1 more source

Intraoral Drug Delivery: Bridging the Gap Between Academic Research and Industrial Innovations

open access: yesAdvanced Functional Materials, EarlyView.
Intraoral drug delivery offers a promising route for systemic and localized therapies, yet challenges such as enzymatic degradation, limited permeability, and microbial interactions hinder efficacy. This figure highlights innovative strategies—mucoadhesive materials, enzyme inhibitors, and permeation enhancers—to overcome these barriers.
Soheil Haddadzadegan   +4 more
wiley   +1 more source

Ultrafast Energy Transfer Induced Lasing From a Coplanar Donor‐Acceptor‐Donor Molecule in a Microspherical Cavity

open access: yesAdvanced Functional Materials, EarlyView.
This study presents a novel donor‐bridge‐acceptor‐bridge‐donor (D‐B‐A‐B‐D) molecular system, which shows near‐unity intramolecular excitation energy transfer (IET) from two identical energy donors to a coplanar acceptor. It enables a four‐level energy system for efficient lasing at the acceptor emission band in a microspherical cavity with a low lasing
Vishal Kumar   +6 more
wiley   +1 more source

Alkyl-Chitosan-Based Adhesive: Water Resistance Improvement

open access: yesMolecules, 2019
A chemical modification by grafting alkyl chains using an octanal (C8) on chitosan was conducted with the aim to improve its water resistance for bonding applications.
Narimane Mati-Baouche   +7 more
doaj   +1 more source

Influence of bidisperse self-assembled monolayer structure on the slip boundary condition of thin polymer films [PDF]

open access: yes, 2016
Alkylsilane self-assembled monolayers (SAMs) are often used as model substrates for their ease of preparation and hydrophobic properties. We have observed that these atomically smooth monolayers also provide a slip boundary condition for dewetting films composed of unentangled polymers.
arxiv   +1 more source

Preparation of perfluorinated 1,2,4-oxadiazoles [PDF]

open access: yes, 1982
Fluorinated alkyl or alkylether 1,2,4 oxadiazole compounds are prepared by cyclizing the corresponding alkyl or alkylether imidoyl amidoximes in vacuo or in an inert atmosphere at a temperature within the range of 40 C to 100 C.
Ito, T. I.   +3 more
core   +1 more source

Home - About - Disclaimer - Privacy