Results 71 to 80 of about 7,946 (266)

Clerodendrum colebrookianum extract mediated synthesis of AgNPs and its effective application as a sustainable catalyst for Oxazine transformation in neat condition and antibacterial activity.

Chemical Physics Impact, 2022
Silver nanoparticles (AgNPs) were synthesized through greener route using the Ethanol extract of Clerodendrum colebrookianum leaves. The synthesized AgNPs were characterized and confirmed through using various analytical studies like FT-IR, UV–vis, XRD ...
Putusenla Imchen, Betokali K Zhimomi, Toka Swu, Tovishe Phucho   +3 more
doaj  

Conformational studies on some nitrogen containing compounds. [PDF]

, 1971
Some N.M.R. techniques used in conformational analysis, the principal factors peculiar to heterocyclic conformational analysis, and the background to conformational effects in alkyl substituted hydroxylamines are reviewed. The synthesis of N-carbethoxy-
Williams, David A R
core  

Syntheses, transformations and applications of aminonaphthol derivatives prepared via modified Mannich reactions [PDF]

, 2013
A special alteration is the three-component modi fi ed Mannich reaction (mMR), in which formaldehyde is replaced by an aromatic aldehyde, the secondary amine by ammonia, and the C e H acid by an electron-rich aromatic compound such as 1- or 2 ...
Fülöp, Ferenc, Szatmári, István
core   +1 more source

Design of Aromatic Interaction Networks in a Protein Cage Modulated by Fluorescent Ligand Binding

Advanced Science, Volume 12, Issue 15, April 17, 2025.
The study presents a novel system designed to control protein dynamics by orientational changes of aromatic residues triggered by ligand binding. By creating aromatic pockets within protein cages and binding fluorescent molecules via π–π interactions, the study achieves cooperative conformational change verified through X‐ray crystallography.
Yuki Hishikawa, Taiga Suzuki, Basudev Maity, Hiroki Noya, Michito Yoshizawa, Asuka Asanuma, Yuri Katagiri, Satoshi Abe, Satoru Nagatoishi, Kouhei Tsumoto, Takafumi Ueno   +10 more
wiley   +1 more source

Random Laser Emission at Dual Wavelengths in a Donor-Acceptor Dye Mixture Solution [PDF]

arXiv, 2016
The work was aimed to generate random laser emissions simultaneously at two wavelengths in a weakly scattering system containing mixture of binary dyes, rhodamine-B (Rh-B) and oxazine-170 (O-170) dispersed with ZnO nano-particles served as scattering centres.
arxiv  

An Examination of Synthetic Routes to Papaverine, and, Synthetic Studies in 1:4 Oxazine Chemistry [PDF]

, 1951
Part I - An Examination of Synthetic Routes to Papaverine. In an attempt to establish a new synthesis of the alkaloid papaverine, four possible routes were examined.
Dawson, William
core  

Bridging Frontiers in Macromolecular and Supramolecular Sciences with Living Cationic Ring‐Opening Polymerization of Self‐Organizable Dendronized Cyclic‐Imino Ethers Generating Soft Frank–Kasper and Quasicrystal Arrays

Macromolecular Chemistry and Physics, Volume 226, Issue 7, April 2025.
This Perspective bridges between the frontiers of macromolecular chemistry and supramolecular chemistry with the help of living cationic‐ring opening polymerization of self‐organizable cyclic imino ethers. The goal of this research is to attempt to bring synthetic self‐organizations to the same level of perfection and functionality similar to that of ...
Virgil Percec, Dipankar Sahoo
wiley   +1 more source

Melt Electrowriting of Polyhydroxyalkanoates for Enzymatically Degradable Scaffolds

Advanced Healthcare Materials, Volume 14, Issue 6, March 3, 2025.
Melt electrowriting (MEW) enables fabrication of high‐resolution scaffolds for tissue engineering, yet few printable materials are available. Polyhydroxyalkanoates (PHAs), like PHBV and PHBV+P34HB, excel as biobased, biodegradable, and well‐printable materials, with PHBV+P34HB exhibiting superior thermal stability.
Magdalena Z. Gładysz, Didi Ubels, Marcus Koch, Armin Amirsadeghi, Frederique Alleblas, Sander van Vliet, Marleen Kamperman, Jeroen Siebring, Anika Nagelkerke, Małgorzata K. Włodarczyk‐Biegun   +9 more
wiley   +1 more source

Synthesis of 2H‐1,4‐Oxazin‐3(4H)‐One Utilizing Umpolung Reaction to α‐Hydrazonoketone

Asian Journal of Organic Chemistry, Volume 14, Issue 3, March 2025.
An Efficient Method of the Synthesis of a 2H‐1,4‐Oxazin‐3(4H)‐One via the Tandem N‐Alkylation/Reduction/N‐Acyl‐O‐Alkylation of α‐Hydrazonoketone Has Been Developed. This Reaction Proceeds Extremely Quickly Under Mild Conditions, in Particular, N‐Methylation Proceeds Quantitatively, Which Was Difficult to Achieve by Conventional Umpolung N‐Alkylation ...
Isao Mizota, Keiji Oshima, Nozomi Hoshiai, Ayaki Yamamoto, Masaki Mitani, Rabbia Batool, Bo‐Tau Liu, Makoto Shimizu   +7 more
wiley   +1 more source

Microwave-assisted one-pot efficient synthesis of functionalized 2-oxo-2-phenylethylidenes-linked 2-oxo-benzo[1,4]oxazines and 2-oxo-quino[1,4]oxalines: Synthetic Applications, Antioxidant activity, SAR and Cytotoxic Studies

Acta Chimica Slovenica, 2017
A microwave-assisted, environmentally benign green protocol for the synthesis of functionalized (Z)-3-(2-oxo-2-phenylethylidene)-3, 4-dihydro-2H-benzo[b][1,4]oxazin-2-ones 11a-n in excellent yields (upto 97%) and (Z)-3-(2-oxo-2-phenylethylidene)-3,4 ...
Vashundhra Sharma, Pradeep K. Jaiswal, Dharmendra K. Yadav, Mukesh Saran, Jaroslav Prikhodko, Manas Mathur, Ajit K. Swami, Irina V. Mashevskaya, Sandeep Chaudhary   +8 more
doaj   +1 more source