Results 61 to 70 of about 187,468 (290)

A highly contiguous, scaffold-level nuclear genome assembly for the fever tree (Cinchona pubescens Vahl) as a novel resource for Rubiaceae research

GigaByte, 2022
The Andean fever tree (Cinchona L.; Rubiaceae) is a source of bioactive quinine alkaloids used to treat malaria. C. pubescens Vahl is a valuable cash crop within its native range in northwestern South America, however, genomic resources are ...
Nataly Allasi Canales , Oscar A. Pérez-Escobar , Robyn F. Powell , Mats Töpel , Catherine Kidner , Mark Nesbitt , Carla Maldonado , Christopher J. Barnes , Nina Rønsted , Natalia A. S. Przelomska , Ilia J. Leitch , Alexandre Antonelli   +11 more
doaj   +1 more source

Organocatalytic synthesis of axially chiral atropisomers [PDF]

, 2017
This review summarises the recent progress made in the organocatalytic synthesis of atropisomeric compounds. Methodologies based on dynamic kinetic resolution and direct access to BINOL-like biaryls are described.
Renzi, P.
core   +1 more source

Chiral modification of platinum: ab initio study of the effect of hydrogen coadsorption on stability and geometry of adsorbed cinchona alkaloids.

Physical Chemistry, Chemical Physics - PCCP, 2015
The cinchona alkaloids cinchonidine and cinchonine belong to the most efficient chiral modifiers for the noble metal-catalyzed enantioselective hydrogenation of C=O and C=C bonds.
K. Hahn, A. Seitsonen, A. Baiker
semanticscholar   +1 more source

The continuing significance of chiral agrochemicals

Pest Management Science, Volume 81, Issue 4, Page 1697-1716, April 2025.
In the time frame 2018–2023, around 43% of the 35 chiral agrochemicals introduced to the market (herbicides, fungicides, insecticides, acaricides, and nematicides) contain one or more stereogenic centers in the molecule, and almost 69% of them have been marketed as racemic mixtures of enantiomers or stereoisomers.
Peter Jeschke
wiley   +1 more source

Advances in the Different Synthetic Routes of Fluorinated Hydrazines

The Chemical Record, EarlyView.
This review highlights the various routes to the preparation of fluorinated hydrazines, thereby promoting the exploration of innovative methods for the synthesis of new N‐fluorinated hydrazines. Their synthesis mainly involves synthetic routes such as organometallic, organocatalytic, and photocatalytic.
Dimitra Kyrko, Benoît Crousse
wiley   +1 more source

Enantioselective Synthesis of α‐Arylated Allene Ketones Through Sequential Bismuth(V)‐mediated Arylation and Organocatalytic Protonation

Angewandte Chemie, Volume 137, Issue 48, November 24, 2025.
We report an asymmetric synthesis of α‐arylated allenones achieved via sequential bismuth(V)‐mediated arylation and organocatalytic protonation. This method furnishes enantioenriched α‐arylated allenones with broad functional‐group tolerance. Mechanistic studies support a cascade sequence involving enolate formation, arly migration, and irreversible ...
Kun Zhu, Yuli Sun, Yunhan Ma, Zugen Wu, Yixin Lu   +4 more
wiley   +2 more sources

CONSTITUINTES QUÍMICOS E ATIVIDADES BIOLÓGICAS DE Remijia DC. (RUBIACEAE): UMA REVISÃO [PDF]

Química Nova
Plants of Remijia DC. (Rubiaceae) are widely distributed in South America and are often known by the popular names of “quinas” and “quinas-falsas” because of their similarity to the genus Cinchona L.
Fábio G. de Souza, Gabriel S. Crispim, Luana da C. Moreira, Cecilia V. Nunez   +3 more
doaj   +1 more source

Organocatalytic stereodivergent synthesis of β,β-disubstituted-α-aminoacids [PDF]

, 2017
In this work, we present an organocatalytic stereodivergent synthesis of β,β-disubstituted-α-aminoacids using arylidene azlactones as starting materials.
Martinelli, Ada
core  

Chirality in halogen-bonded supramolecular architectures [PDF]

, 2011
s of the XXII IUCr ...
G. Resnati, G. Terraneo, P. Metrangolo, S. Biella, T. Pilati   +4 more
core   +1 more source

Artemisinin: From Chinese Herbal Medicine to Modern Chemotherapy [PDF]

, 2019
Malaria is a disease that has blighted humankind since early times. The first antimalarial treatment available to Europeans was the dried bark of the cinchona tree from Peru. The main problem in its use was adulteration by other material.
Butler, Anthony
core   +1 more source