Results 51 to 60 of about 29,714,115 (240)

New Methods of Resolution and Purification of Racemic and Diastereomeric Amino Alcohol Derivatives Using Boric Acid and Chiral 1,1‘-Bi-2-naphthol

, 2016
Resolution of the racemic amino alcohol derivatives 1−6 is readily achieved to obtain enantiomerically enriched compounds using chiral 1,1‘-bi-2-naphthol and boric acid in solvents such as CH3CN, THF, and MeOH.
Vutukuri Dharma Rao (3027999), Nangunoori Sampath Kumar (3027996), Sangarappan Sivakumar (2726590), C. Ramaraj Ramanathan (3028002), Mariappan Periasamy (1393039), Lakshmanan Venkatraman (2509903)   +5 more
core   +1 more source

Preparation of 5-Bromo-2-naphthol: The Use of a Sulfonic Acid as a Protecting and Activating Group

Molbank, 2009
The preparation of 5-bromo-2-naphthol (4) in three steps from 5-amino-2-naphthol (1) is described. A sulfonic acid group is introduced at the 1-position as an activating and protecting group for the Sandmeyer reaction.
Christopher Abelt, Jillian Hamilton, Renata Everett   +2 more
doaj   +1 more source

Novel chromogenic aminopeptidase substrates for the detection and identification of clinically important microorganisms [PDF]

, 2014
A series of amino acid derivatives 8-10, 42 and 43 have been prepared as chromogenic enzyme substrates in order to detect aminopeptidase activity in clinically important Gram-negative and Gram-positive bacteria.
James, Arthur, Rasul, Ari, Stanforth, Stephen, Cellier, Marie, Orenga, Sylvain, Perry, John, Robinson, Shaun   +6 more
core   +1 more source

One‐Pot Synthesis of a Small Synthetic Ligand for Antibody Purification

Biotechnology and Bioengineering, EarlyView.
One‐pot liquid‐phase synthesis of the synthetic ligand B1Al2A2 enables controllable ligand density and efficient capture of IgG and IgY with high recovery and purity, streamlining small‐ligand affinity purification workflows. ABSTRACT The development of synthetic affinity ligands offers a cost‐effective alternative to traditional biological ligands ...
Carolina Mota Natal, Catarina Domingos, André Nascimento, José Mendes, Afonso B. Ruiz, Ana Margarida Gonçalves Carvalho Dias, Luisa M. Ferreira, Cristina Peixoto, Ana Cecília Afonso Roque   +8 more
wiley   +1 more source

Developmental toxicity of embryonic 1-naphthol exposure in zebrafish

Di-san junyi daxue xuebao, 2019
Objective To investigate the toxic effects of embryonic exposure to 1-naphthol (1-NAP) on zebrafish development and explore the possible mechanism. Methods Fertilized zebrafish eggs were exposed to 1-NAP at the concentrations of 40, 80, 160 and 200 μmol ...
REN Pingping, REN Pingping, SHU Liping, WANG Yihui, WANG Yihui   +4 more
doaj   +1 more source

Nitrooxylation in Organic Synthesis: From Classical Nitrate Ester Formation to Modern Catalytic Strategies

Chemistry – A European Journal, EarlyView.
Nitrooxylation—the installation of nitrate esters (–ONO2) has evolved from classical mixed‐acid protocols to catalytic and mechano‐, flow‐, photo‐, and electrochemical strategies. This review delineates ionic and radical manifolds for C–ONO2 bond formation, emphasizing mechanistic control, selected substrate scope, and selectivity.
Jayanta Dey, Dmitry Katayev
wiley   +1 more source

Coordination Chemistry of Boron Subphthalocyanine With BINOL Derivatives: Unexpected Oxidation to Oxa[4]Helicene and Properties of the Resulting Axially Coordinated Complexes Containing Oxa[4]Helicene and/or BINOL Derivatives

Chemistry – A European Journal, EarlyView.
Treatment of BINOL with a boron subphthalocyanine derivative resulted in the formation of a complex coordinated to an oxa[4]helicene derivative, which is generated via a ring‐closure reaction of BINOL. In contrast, treatment of the monomethyl ether of 1,1′‐bi‐2‐naphthol (BINOL) afforded the expected axially coordinated complex.
Shafikul Islam, Kazuyuki Asahi, Hiroyuki Nishikawa, Daiki Tauchi, Masashi Hasegawa, Ken‐ichi Sugiura   +5 more
wiley   +1 more source

Accurate intermolecular binding energies of 1-naphthol to benzene and cyclohexane

, 1997
Accurate dissociation energies were determined for gas-phase complexes between 1-naphthol and benzene, d6-benzene and cyclohexane, using the stimulated emission pumping resonant two-photon ionization spectroscopy technique in supersonic jets.
Buergi, Thomas, Leutwyler, Samuel, Wickleder, Claudia, Droz, Thierry   +3 more
core   +1 more source

Synthesis and Structures of Novel Chiral Cyclic Hypervalent Iodine(III) Reagents for Metal‐Free Ligand‐Transfer Reactions

Chemistry – A European Journal, EarlyView.
Several new chiral cyclic hypervalent iodine(III) reagents have been synthesized and characterized. Carbon‐based ligands were successfully installed onto the hypervalent iodine centers, giving thus access to novel chiral cyano‐, trifluoromethyl‐ or alkynyl‐bearing λ3‐iodanes.
Emmanuel Valzer, Jean‐Marc Sotiropoulos, Karinne Miqueu, Laurent Pouységu, Stéphane Quideau   +4 more
wiley   +1 more source

Efficient Cleavage of pUC19 DNA by Tetraaminonaphthols

ChemistryOpen
In an attempt to create models of phosphodiesterases, we previously investigated bis(guanidinium) naphthols. Such metal‐free anion receptors cleaved aryl phosphates and also plasmid DNA.
Catharina Kost, Ute Scheffer, Elisabeth Kalden, Michael Wilhelm Göbel   +3 more
doaj   +1 more source