Results 51 to 60 of about 1,089 (139)

Efficient Synthesis of B-Alkylated Oxazaborolidines Derived from Ephedrine and Norephedrine

, 2016
Representative B-butyl- and B-methyl-1,3,2-oxazaborolidines derived from ephedrine and norephedrine were prepared in good yield and excellent purity by one-pot treatment of B-H oxazaborolidines with the corresponding organolithium reagent and subsequent ...
Ruth Figueroa (1887805), Margarita Ortiz-Marciales (1950691), Eduvigis González (3045999), Wildeliz Correa (2221795), Sandraliz Espinosa (1950673), Johanna Martínez (3067455), Melvin De Jesús (2435992)   +6 more
core   +1 more source

Helix−Helix Transition of Optically Active Poly((1R,2S)-N-(4-ethynylbenzyl)norephedrine) Induced by Diastereomeric Acid−Base Complexation Using Chiral Stimuli

, 2016
Helix−Helix Transition of Optically Active Poly((1R,2S)-N-(4-ethynylbenzyl)norephedrine) Induced by Diastereomeric Acid−Base Complexation Using Chiral ...
Yoshio Okamoto (1887238), Eiji Yashima (1569460), Yukio Maeda (3005178)   +2 more
core   +2 more sources

Utilizing Flow State Therapeutically With Survivors and Refuges of War: An Existential‐Humanistic Approach

The Journal of Humanistic Counseling, Volume 64, Issue S1, Page S22-S31, December 2025.
ABSTRACT Survivors and refugees of war often have mental, behavioral, emotional, and spiritual consequences from undergoing civil unrest. In many cases, counselors utilize cognitively‐based therapies as the recommended treatment to alleviate these issues.
Isaac Burt, Luis A. Tosado II
wiley   +1 more source

STEREOSELECTIVE RADICAL-MEDIATED CYCLIZATION OF NOREPHEDRINE DERIVED O-BROMOBENZAMIDES - ENANTIOSELECTIVE SYNTHESIS OF 4-SUBSTITUTED 1,2,3,4-TETRAHYDROISOQUINOLINES

, 1993
Radical-mediated cyclization of norephedrine derived o-bromobenzamide 5 was found to be fairly stereoselective (85:15)favouring diastereoisomer trans-6.
Laura Belvisi, Giovanni Poli, G. POLI, C. SCOLASTICO, Barbara Salom, L. BELVISI, Carlo Scolastico, Cesare Gennari, C.M.A. GENNARI, B. SALOM   +9 more
core   +1 more source

Fused Nitrogen Bridgehead N,O‐Acetals as Versatile Scaffolds: Synthetic Strategies, Mechanism and Applications

Chemistry – A European Journal, Volume 31, Issue 32, June 6, 2025.
Fused nitrogen‐bridgehead N,O‐acetals receive specific emphasis as pivotal scaffolds due to their significant role in the bioactivity of medicinally relevant molecules. Significant approaches have been reported on their role as key synthetic building blocks/motifs in the construction of complex organic molecules and their utility as chiral auxiliaries ...
Alexis D. Kouvelas, Michael G. Kallitsakis, Ioannis N. Lykakis   +2 more
wiley   +1 more source

Reaction Engineering for Asymmetric R‐/S‐PAC Synthesis With Ephedrine or Pseudoephedrine Dehydrogenase in Pickering Emulsion

Engineering in Life Sciences, Volume 25, Issue 2, February 2025.
ABSTRACT The synthesis of enantiopure α‐hydroxy ketones, particularly R‐ and S‐phenylacetylcarbinol (PAC), represents an important process in the pharmaceutical industry, serving as a pivotal step in the production of drugs. Recently, two novel enzymes, ephedrine dehydrogenase (EDH) and pseudoephedrine dehydrogenase (PseDH), have been described.
Reynaldo Jr. Carubio, Bao‐Hsiang Wang, Marion B. Ansorge‐Schumacher   +2 more
wiley   +1 more source

STEREOSELECTIVE RADICAL-MEDIATED CYCLIZATION OF NOREPHEDRINE DERIVED ALPHA-IODOAMIDES - SYNTHESIS OF ENANTIOPURE PYRROLIDINES AND TRANSITION-STATE MODELING

, 1992
Radical-mediated cyclization of norephedrine derived alpha-iodoamides 1 was found to be highly stereoselective (> 97.3) favouring diastereoisomer 2. Bicyclic lactams 2 were transformed in high yields into enantiomerically pure pyrrolidines 10. Transition
Laura Belvisi, Marco Vassallo, Giovanni Poli, G. POLI, C. SCOLASTICO, Barbara Salom, L. BELVISI, Carlo Scolastico, Cesare Gennari, C.M.A. GENNARI, M. VASSALLO, B. SALOM   +11 more
core   +1 more source

Two‐Step Biocatalytic Synthesis of (1S)‐Nor(pseudo)ephedrine Catalyzed by Immobilized Enzymes

ChemCatChem, Volume 16, Issue 19, October 7, 2024.
A biocatalytic cascade was designed for the synthesis of (1S,2S)‐norpseudoephedrine [(1S,2S)‐NPE] and (1S,2R)‐norephedrine [(1S,2R)‐NE], involving a benzoin‐type condensation catalyzed by (S)‐selective acetoin:dichlorophenolindophenol oxidoreductase (Ao : DCPIP OR), followed by a transamination mediated by (S)‐ or (R)‐selective amine transaminase (ATA).
Stefania Patti, Ilaria Magrini Alunno, Riccardo Semproli, Davide Tessaro, Daniela Monti, Sergio Riva, Daniela Ubiali, Erica Elisa Ferrandi   +7 more
wiley   +1 more source

Intermolecular One‐Pot Cyclization of Formyl‐Pyrroles of Amino Acid Esters with Norephedrine: Stereoselective Routes to New Tricyclic Pyrrole—Pyrazine—Oxazole Fused Structures.

, 2006
The treatment of esters of amino acids with dimethoxytetrahydrofuran furnished pyrrole derivatives of amino acid esters. The Wilsmeier-Haack formylation followed by the reaction of the formylated pyrroles with norephedrine afforded a selective formation ...
N. Tuna Subasi, Demir, Ayhan S., Subasi, N. Tuna, Ayhan S. Demir, Ertan Sahin, Demir, Ayhan Sıtkı, Sahin, Ertan   +6 more
core   +1 more source

Golden Guardians: Advanced pH Sensors with Built‐in Antimicrobial Defense

Advanced Optical Materials, Volume 12, Issue 30, October 24, 2024.
Ultrasmall norephedrine‐capped gold nanoclusters (Au@Nore) exhibit high photoluminescence (ΦPL of up to 33%) reversible ratiometric pH sensing and pH‐dependent antimicrobial activity. They enabled us to evaluate the pH sensing and their biological effect on bacteria and yeast. Abstract Gold nanoclusters (Au NCs) capped with a small biomolecule, namely (
Miguel Justo‐Tirado, Irene Pérez‐Herráez, María Auxiliadora Dea‐Ayuela, Carolina Galiana, Jorge González‐García, Elena Zaballos‐García, Julia Pérez‐Prieto   +6 more
wiley   +1 more source