Results 31 to 40 of about 3,396 (226)

Synthesis of Chiral 1,4,2-Oxazaphosphepines

Molecules, 2015
Synthesis and structural characterization of 1,4,2-oxazaphosphepines is described. The 1,4,2-oxazaphosphepines were obtained from reaction of chiral 1,3-benzoxazines with dichlorophenylphosphine or triethyl phosphite.
Oscar Salgado-Escobar, Leticia Chavelas-Hernández, Blanca E. Domínguez-Mendoza, Irma Linzaga-Elizalde, Mario Ordoñez   +4 more
doaj   +1 more source

Efficient Syntheses of Diverse N-Heterocycles: The Molybdenum(VI)-Catalyzed Reductive Cyclization of Nitroarenes using Pinacol as a Deoxygenating­ Agent

SynOpen, 2018
Molybdenum(VI)-catalyzed domino reductive cyclization of nitroarenes has been devised for the syntheses of 1,4-benzoxazines and 1,4-benzothiazines in the presence of pinacol as deoxygenating agent.
Raghuram Gujjarappa, Nagaraju Vodnala, Arup K. Kabi, Dhananjaya Kaldhi, Mohan Kumar, Uwe Beifuss, Chandi C. Malakar   +6 more
doaj   +1 more source

Nucleophilic Imines and Electrophilic o‑Quinone Methides, a Three-Component Assembly of Assorted 3,4-Dihydro‑2H‑1,3-benzoxazines

, 2019
A one-pot method for joining three separate components leading to an assortment of N-substituted 3,4-dihydro-2H-1,3-benzoxazines is described. The method involves the addition of a Grignard reagent to an o-OBoc salicylaldehyde in the presence of an imine.
Thomas R. R. Pettus (7399856), Kazaf KC Chan (11874279), Yuk Fai Wong (7399850), Derek Yang (7399853)   +3 more
core   +1 more source

Metal salts used as an efficient catalyst to reduce the ring opening polymerization temperature of benzoxazines

, 2022
An attempt was made to develop low-temperature curing aniline-based benzoxazines (BA-a/BF-a) using various transition metal salts, such as FeCl3, CoCl2, NiBr2, CuCl2, ZnCl2, Zn(OAc)2, CdCl2 and Alkali–Alkaline earth metal salts, such as LiCl, KI and ...
S. Devaraju (13042953), K. Ravi Kumar (1838554), P. Eswar (13042956), T. Gangadhar Reddy (13042959)   +3 more
core   +2 more sources

Coumarin-Annulated Ferrocenyl 1,3-Oxazine Derivatives Possessing In Vitro Antimalarial and Antitrypanosomal Potency

Molecules, 2021
A tailored series of coumarin-based ferrocenyl 1,3-oxazine hybrid compounds was synthesized and investigated for potential antiparasitic activity, drawing inspiration from the established biological efficacy of the constituent chemical motifs.
Mziyanda Mbaba, Laura M. K. Dingle, Ayanda I. Zulu, Dustin Laming, Tarryn Swart, Jo-Anne de la Mare, Heinrich C. Hoppe, Adrienne L. Edkins, Setshaba D. Khanye   +8 more
doaj   +1 more source

Synthesis and characterization of novel mussel-inspired benzoxazines bythiol-benzoxazine chemistry

TURKISH JOURNAL OF CHEMISTRY, 2019
A catechol-based benzoxazine copolymer is reported via a new approach using an oxazine-thiol reaction.The main chain benzoxazine precursor was obtained via the classic benzoxazine synthesis methodology using the raw chemicals catechol, formaldehyde, and 4,7,10-trioxa-1,13-tridecanediamine. The countercomponent was synthesized from poly(ethylene glycol)
openaire   +2 more sources

Epoxy-Benzoxazine Powder Binders for Producing Reinforced Composites with a Matrix Gradient

Учёные записки Казанского университета: Серия Естественные науки
Carbon composites with graded binder distribution along the product cross-section were developed using epoxy-benzoxazine powder binders. Their rheological, thermophysical, and physicomechanical properties were analyzed.
R. R. Amirov, K. A. Andrianova, V. S. Nikitin, I. S. Antipin, L. M. Amirova   +4 more
doaj   +1 more source

Sulfur‐Rich Sustainable Copolymers for Enhancing Redox Kinetics and Alleviating Cathode Passivation in Lithium‐Sulfur Batteries

Exploration, EarlyView.
A molecularly engineered, sustainable sulfur‐rich redox copolymer cathode delivers accelerated sulfur conversion and suppressed passivation, enabling high sulfur utilization and durable, high‐performance LiS batteries. ABSTRACT Lithium‐sulfur (Li‐S) batteries are promising candidates for advanced energy storage systems.
Sangeeta Sahu, Arnab Ghosh, Monisha Monisha, Murali Krishna, Shakir Ali Siddiqui, Sunan Tian, De‐Yi Wang, Sagar Mitra, Bimlesh Lochab   +8 more
wiley   +1 more source

Synthesis of Enantiopure 3-Azabicyclo[3.2.0]heptanes by Diastereoselective Intramolecular [2+2] Photocycloaddition Reactions on Chiral Perhydro-1,3-benzoxazines

, 2016
[2+2] photocycloadditions involving chiral 3-acryloyl-2-vinylperhydro-1,3-benzoxazines derived from (−)-8-aminomenthol are highly diastereoselective reactions.
Javier Nieto (131402), Rafael Pedrosa (1748134), Celia Andrés (2520307), Soledad del Pozo (2692753)   +3 more
core   +1 more source

Position effects of nitrile groups on the thermal and oxidative stability of benzoxazines for defense applications

Materials Letters: X
This paper focuses on the development of thermosetting resins with lightweight, excellent thermal stability and oxidation resistance. Specifically, the curing behavior and thermal properties of benzoxazines incorporating nitrile groups at the ortho, meta,
Gyeongbeom Kim, Eunhye Lee, Man Young Lee, Jong Sung Won   +3 more
doaj   +1 more source