Results 51 to 60 of about 36,836 (288)

Synthesis of new pyrrolidine-based organocatalysts and study of their use in the asymmetric Michael addition of aldehydes to nitroolefins

Beilstein Journal of Organic Chemistry, 2017
New pyrrolidine-based organocatalysts with a bulky substituent at C2 were synthesized from chiral imines derived from (R)-glyceraldehyde acetonide by diastereoselective allylation followed by a sequential hydrozirconation/iodination reaction.
Alejandro Castán, Ramón Badorrey, José A. Gálvez, María D. Díaz-de-Villegas   +3 more
doaj   +1 more source

Azaporphyrinoid‐Based Photo‐ and Electroactive Architectures for Advanced Functional Materials

Advanced Materials, EarlyView.
A long‐standing collaboration between the Torres and Guldi groups has yielded diverse azaporphyrinoid‐based donor‐acceptor nanohybrids with promising applications in solar energy conversion. This conspectus highlights key molecular platforms and structure‐function relationships that govern light and charge management, supporting the rational design of ...
Jorge Labella, Kobra Azizi, Dirk M. Guldi, Tomás Torres   +3 more
wiley   +1 more source

Asymmetric additions to dienes catalysed by a dithiophosphoric acid. [PDF]

, 2011
Chiral Brønsted acids (proton donors) have been shown to facilitate a broad range of asymmetric chemical transformations under catalytic conditions without requiring additional toxic or expensive metals.
Hamilton, Gregory, Rauniyar, Vivek, Shapiro, Nathan, TOSTE, F. Dean, Wu, Jeffrey   +4 more
core   +2 more sources

Synthesis and biological evaluation of nojirimycin- and pyrrolidine-based trehalase inhibitors

Beilstein Journal of Organic Chemistry, 2012
A small set of nojirimycin- and pyrrolidine-based iminosugar derivatives has been synthesized and evaluated as potential inhibitors of porcine and insect trehalases.
Davide Bini, Francesca Cardona, Matilde Forcella, Camilla Parmeggiani, Paolo Parenti, Francesco Nicotra, Laura Cipolla   +6 more
doaj   +1 more source

Skeletal contraction: A novel strategy to access multisubstituted cyclobutane

Green Synthesis and Catalysis, 2022
The polysubstituted and spirocyclic cyclobutanes were efficiently constructed by the utilization of a novel skeletal contraction strategy which only took one-step synthesis from the readily accessible pyrrolidines.
Chunfa Xu, V.U. Bhaskara Rao, Fen-Er Chen   +2 more
doaj   +1 more source

Design and Utilization of Stable Hydrofluoroolefin‐Based Trifluoropropynyl Surrogate for Sonogashira Coupling

Advanced Synthesis &Catalysis, EarlyView.
A novel methodology for the construction of aromatic and heteroaromatic trifluoropropynyl derivatives has been developed. The new protocol is based on a tandem Sonogashira cross‐coupling reaction between a bench‐stable trifluoropropynyl carbinol reagent, generated from the commercially available and inexpensive hydrofluoroolefin‐1234yf gas, and (hetero)
Emma Bodnár, Ferenc Béke, Klára Aradi, Zoltán Novák   +3 more
wiley   +1 more source

Palladium and Platinum 2,4-cis-amino Azetidine and Related Complexes [PDF]

, 2018
Seven N,N’-palladium(II) chloride complexes, one N,N’-palladium(II) acetate complex of 2,4-cis-azetidines where prepared and analyzed by single crystal XRD.
Binder, Choi, Clavier, Coles, Falivene, Feula, Feula, Feula, Fossey, Fossey, Fossey, Fossey, Fossey, Fossey, Gaertner, Graham, Hama Salih, Hambley, Jamieson, Keller, Lee, Lee, Lee, Leonard, Martínez-Olid, Payne, Pelz, Pelz, Poater, Rixe, Saito, Voureka, Yoshizawa, Yoshizawa, Yoshizawa, Álvarez-Casao   +35 more
core   +5 more sources

A Straightforward Route to Enantiopure Pyrrolizidines and Indolizidines by Cycloaddition to Pyrroline N-Oxides Derived from the Chiral Pool

Molecules, 1998
Enantiomerically pure, five membered cyclic nitrones, easily obtained in large amounts from protected hydroxyacids and aminoacids such as D- and L-tartaric, L-malic, and L-aspartic acids, give cycloaddition reactions with a good diastereocontrol.
Alberto Brandi, Valentina Fedi, Franca M. Cordero, Stefano Cicchi, Andrea Goti   +4 more
doaj   +1 more source

Convenient access to pyrrolidin-3-ylphosphonic acids and tetrahydro-2H-pyran-3-ylphosphonates with multiple contiguous stereocenters from nonracemic adducts of a Ni(II)-catalyzed Michael reaction

Beilstein Journal of Organic Chemistry, 2020
A new synthetic strategy toward nonracemic phosphoryl-substituted pyrrolidines and tetrahydropyranes with three and five contiguous stereocenters is presented.
Alexander N. Reznikov, Dmitry S. Nikerov, Anastasiya E. Sibiryakova, Victor B. Rybakov, Evgeniy V. Golovin, Yuri N. Klimochkin   +5 more
doaj   +1 more source

Decoding Proton‐Coupled Electron Transfer Mechanism of Nicotine for Multi‐Scenario Portable Electrochemical Sensing

Advanced Science, EarlyView.
A key challenge in nicotine electroanalysis is the unresolved complexity of its interface process, which directly determines sensor metrics. Herein, the proton‐coupled electron transfer mechanism of nicotine is decoded for multi‐scenario portable electrochemical sensing.
Yi Peng, Qinyi Cao, Qianyu Shen, Yuhang Zhang, Shiyu Hu, Hongdou Yi, Qian Liu, Lihui Ou, Qiang Li, Zhaohong Su   +9 more
wiley   +1 more source