Results 21 to 30 of about 1,863 (161)

Synthesis of 2-Oxazolines from Ring Opening Isomerization of 3-Amido-2-Phenyl Azetidines

Molecules, 2021
Chiral 2-oxazolines are valuable building blocks and famous ligands for asymmetric catalysis. The most common synthesis involves the reaction of an amino alcohol with a carboxylic acid.
Xin Zhou, Baiyi Mao, Zhanbin Zhang
doaj   +1 more source

4-Membered Ring Carbocations: A Positive Development in the Synthesis of 3,3-Disubstituted Oxetanes and Azetidines

CHIMIA, 2023
4-Membered heterocycles are low molecular weight polar scaffolds with intriguing potential for drug discovery. Despite their unquestionable value, methods to access such heterocycles remain scant.
Juan J. Rojas, James A. Bull
doaj   +1 more source

Synthesis of New Azetidine and Oxetane Amino Acid Derivatives through Aza-Michael Addition of NH-Heterocycles with Methyl 2-(Azetidin- or Oxetan-3-Ylidene)Acetates

Molecules, 2023
In this paper, a simple and efficient synthetic route for the preparation of new heterocyclic amino acid derivatives containing azetidine and oxetane rings was described.
Emilis Gudelis, Sonata Krikštolaitytė, Monika Stančiauskaitė, Urtė Šachlevičiūtė, Aurimas Bieliauskas, Vaida Milišiūnaitė, Rokas Jankauskas, Neringa Kleizienė, Frank A. Sløk, Algirdas Šačkus   +9 more
doaj   +1 more source

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

Frontiers in Chemistry, 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.
Akina Yoshizawa, Antonio Feula, Andrew G. Leach, Louise Male, John S. Fossey   +4 more
doaj   +1 more source

Organocatalytic Access to Enantioenriched Spirooxindole-Based 4-Methyleneazetidines

Molecules, 2017
This work describes the synthesis of enantioenriched spiro compounds, incorporating the azetidine and the oxindole motifs. The preparation relies on a formal [2 + 2] annulation reaction of isatin-derived N-tert-butylsulfonyl ketimines with allenoates ...
Giulia Rainoldi, Matteo Faltracco, Claudia Spatti, Alessandra Silvani, Giordano Lesma   +4 more
doaj   +1 more source

Functionalized azetidines via visible light-enabled aza Paternò-Büchi reactions

Nature Communications, 2019
The Aza Paternò-Büchi reaction is arguably among the most direct approaches to functionalized azetidines, which are common medicinal scaffolds. Here, the authors report a mild and selective visible light-enabled intramolecular aza Paternò-Büchi reaction ...
Marc R. Becker, Alistair D. Richardson, Corinna S. Schindler   +2 more
doaj   +1 more source

Ring Expansion of Vinylaziridines through the Strain-Release Pericyclic Reaction: Recent Developments and Applications

Molecules, 2013
Recent syntheses of azetidines, pyrrolidines, piperidines and azepines through cycloaddition or sigmatropic rearrangements of vinylaziridines are described. Applications to natural product synthesis and mechanistic investigations are also summarized.
Yu Mi Heo, Seung-Mann Paek
doaj   +1 more source

Structural basis of malaria parasite phenylalanine tRNA-synthetase inhibition by bicyclic azetidines

Nature Communications, 2021
Bicyclic azetidine inhibitors are promising antimalarials that target the Plasmodium cytosolic phenylalanine tRNAsynthetase (cFRS). Here, Sharma et al.
Manmohan Sharma, Nipun Malhotra, Manickam Yogavel, Karl Harlos, Bruno Melillo, Eamon Comer, Arthur Gonse, Suhel Parvez, Branko Mitasev, Francis G. Fang, Stuart L. Schreiber, Amit Sharma   +11 more
doaj   +1 more source

A Novel Class of “Super‐Strained” Spiro Heterocycles: Gateway to 1‐Azaspiro[3.3]heptane Derivatives, and Biological Validation

Angewandte Chemie, EarlyView.
A new class of “super‐strained” spiro heterocycles—spirocyclic 1‐azabicyclo[1.1.0]butanes—was synthesized via insertion of cyclobutane‐, oxetane‐, and azetidine‐containing sulfonium reagents into substituted azirines. The stability of this new class of compounds was studied.
Philipp Natho, Annarita Vicenti, Marco Colella, Francesco Pasca, Giuseppe Romanazzi, Mauro Niso, Carmen Abate, Ernesto Mesto, Emanuela Schingaro, Renzo Luisi   +9 more
wiley   +2 more sources

Borylcyclopropanes: Synthetic Strategies and Applications

Angewandte Chemie, EarlyView.
Borylcyclopropanes (cyclopropanes bearing a boron substituent) sit at the intersection of two privileged frameworks in synthesis. This review provides the first exhaustive survey of their chemistry, spanning metal–carbene, nucleophilic cyclization, radical, hydroboration, and C─H activation routes, and documenting applications in medicinal chemistry ...
Aiza A. Butt, Joseph M. Ready
wiley   +2 more sources