Results 11 to 20 of about 6,873 (149)

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

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   +6 more sources

Triplet Energy Transfer-Driven Intermolecular [2+2] Photocycloaddition of Acyclic Imines and Indoles: Facile Access to Azetidine-Fused Indolines. [PDF]

Adv Sci (Weinh)
An intermolecular aza‐Paternò‐Büchi reaction of indoles and acyclic imines is enabled by visible‐light‐driven triplet energy transfer, providing azetidine‐fused indolines up to 93% yield for 30 examples and providing a novel protocol to access previously inaccessible scaffolds. ABSTRACT Currently, successful examples of the aza‐[2+2] photocycloaddition
Yang G, Han Z, Zhang H, Cui X.
europepmc   +2 more sources

Synthesis of a Spirocyclic Oxetane-Fused Benzimidazole [PDF]

Molecules, 2015
A new synthesis of 2-oxa-7-azaspiro[3.5]nonane is described. Spirocyclic oxetanes, including 2-oxa-6-azaspiro[3.3]heptane were converted into o-cycloalkylaminoacetanilides for oxidative cyclizations using Oxone® in formic acid.
Michael Gurry, Patrick McArdle, Fawaz Aldabbagh   +2 more
doaj   +3 more sources

Novel Sulfonium Reagents for the Modular Synthesis of Spiro[2.3]Hexanes and Heteroatom-Containing Analogues: Synthesis, Application, and Evaluation as Bioisosteres. [PDF]

Angew Chem Int Ed Engl
Strained spirocyclic spiro[2.3]hexane and its heteroatom‐containing derivatives, including previously underrepresented 5‐oxa‐1‐azaspiro[2.3]hexanes and 1,5‐diazaspiro[2.3]hexanes, were synthesized via a modular approach of insertion of cyclobutane‐, oxetane‐, and azetidine‐containing sulfonium reagents into alkenes, carbonyls and imines.
Natho P, Vicenti A, Mastrolorito F, De Franco F, Walsh-Benn L, Colella M, Mesto E, Schingaro E, Nicolotti O, Gioiello A, Luisi R.   +10 more
europepmc   +3 more sources

Azetidine synthesis enabled by photo-induced copper catalysis via [3+1] radical cascade cyclization

The Innovation, 2022
Azetidines are an important type of saturated, highly strained, four-membered, nitrogen-containing heterocyclic compound. These compounds serve as important raw materials, intermediates, and catalysts in organic synthesis, as well as important active ...
Jianye Li, Lu Yu, Yun Peng, Bin Chen, Rui Guo, Xiaodong Ma, Xiao-Song Xue, Yunkui Liu, Guozhu Zhang   +8 more
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

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

1-(2,4-Dinitrophenyl)-3,3-dinitroazetidine

Acta Crystallographica Section E, 2009
In the title compound, C9H7N5O8, the dihedral angle between the mean plane of the azetidine ring and that of the benzene ring is 26.1 (1)°; the planes of the two nitro groups of the azetidine ring are aligned at 88.7 (1)&#
Yu-Lei Guan, Yin Hu, Hai-Xia Ma, Biao Yan, Ji-Rong Song   +4 more
doaj   +1 more source

Length-Dependent Transition from Extended to Folded Shapes in Short Oligomers of an Azetidine-Based α-Amino Acid: The Critical Role of NH···N H-Bonds

Molecules, 2023
Hydrogen bonds (H-bonds) are ubiquitous in peptides and proteins and are central to the stabilization of their structures. Inter-residue H-bonds between non-adjacent backbone amide NH and C=O motifs lead to the well-known secondary structures of helices,
Dayi Liu, Jean-Xavier Bardaud, Zeynab Imani, Sylvie Robin, Eric Gloaguen, Valérie Brenner, David J. Aitken, Michel Mons   +7 more
doaj   +1 more source

1-Benzoyl-3,3-dinitroazetidine

Acta Crystallographica Section E, 2010
In the title gem-dinitroazetidine derivative, C10H9N3O5, the azetidine ring is almost planar, the maximum value of the endocyclic torsion angle being 0.92 (14)°.
Biao Yan, Hai-Xia Ma, Jun-Feng Li, Yu-Lei Guan, Ji-Rong Song   +4 more
doaj   +1 more source