Results 11 to 20 of about 400 (141)
Acta Crystallographica Section E: Crystallographic Communications, 2022 The formation and crystal structure of a zigzag molecular network held together by I...N halogen bonds is reported. In particular, the halogen-bond donor is 1,2-diiodoperchlorobenzene (1,2-C6I2Cl4) while the acceptor is a head-to-tail photoproduct ...
Taylor J. Dunning +2 more
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3-(2,6-Dioxopiperidin-3-yl)-3-azabicyclo[3.2.0]heptane-2,4-dione
Acta Crystallographica Section E, 2009 The title molecule, C11H12N2O4, consists of a 3-azabicyclo[3.2.0]heptane group containing a nearly planar cyclobutane ring (r.m.s. deviation of fitted atoms is 0.0609 Å), fused to a pyrrolidine ring, bonded to a 2,6-dioxopiperidine ring at the
Jerry P. Jasinski +4 more
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Synthesis and structure of 2,4,6-tricyclobutyl-1,3,5-trioxane
Acta Crystallographica Section E: Crystallographic Communications, 2019 The synthesis and structure of 2,4,6,-tricyclobutyl-1,3,5-trioxane, C15H24O3 1, is described. It was formed in 39% yield during the work-up of the Swern oxidation of cyclobutylmethanol and may serve as a stable precursor of the cyclobutane carbaldehyde ...
Sergey V. Shorunov +3 more
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cis,trans,cis-1,2,3,4-Tetrakis[2-(ethylsulfanyl)phenyl]cyclobutane
IUCrData, 2016 The title cyclobutane derivative, C36H40S4, formed serendipitously through a photochemically initiated [2 + 2] cycloaddition. The asymmetric unit contains half a molecule with the 2-(ethylsulfanyl)phenyl substituents in a cis configuration, the other ...
Barbara Sohr +4 more
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Molecules, 2021 The formation of a pair of extended networks sustained by halogen bonds based upon two regioisomers of a photoproduct, namely rctt-1,3-bis(4-pyridyl)-2,4-bis(phenyl)cyclobutane (ht-PP) and rctt-1,2-bis(4-pyridyl)-3,4-bis(phenyl)cyclobutane (hh-PP), that ...
Taylor J. Dunning +3 more
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Reenvisioning the De Mayo Reaction: A Boron‐Enabled Cycloaddition Approach
Angewandte Chemie, EarlyView.An oxa‐boracycle conformational lock strategy enables photocatalytic [2+2] cycloaddition to afford densely substituted cyclobutylboronates. The conformational constraint suppresses triplet relaxation and promotes productive bimolecular reactivity.
Neetu Sharma +5 more
wiley +2 more sources
Angewandte Chemie, EarlyView.Photocycloaddition in stilbene‐type salt polymorphs exhibit distinct light‐driven responses: OHT‐TI shows a violent photosalient effect under visible and NIR (two‐photon) irradiation, whereas OHT‐TII reacts statically. Packing and computational analysis reveals that shell‐like structures in OHT‐TI frustrate structural relaxation, accumulating explosive
Emanuela Santagata +10 more
wiley +2 more sources
[3,4-Bis(2,3-dichlorophenyl)cyclobutane-1,2-diyl]bis(furan-2-ylmethanone) monohydrate
IUCrData, 2017 In the title hydrate, C26H16Cl4O4·H2O, the cyclobutane ring carries two 2,3-dichlorophenyl and two furan-2-ylmethanone substituents. It subtends dihedral angles of 86.6 (3) and 37.3 (3)° with the furan rings and 77.0 (5) and 77.0 (3)° with the ...
N. Renuka +5 more
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Methodology-driven efficient synthesis of cytotoxic (±)-piperarborenine B
Green Synthesis and Catalysis, 2022 The evolution of synthetic design toward the efficient synthesis of cyclobutane natural product (±)-piperarborenine B is demonstrated. Taking the advantages of good functional group compatibility of contractive synthesis of cyclobutanes from pyrrolidines,
Chunngai Hui, Andrey P. Antonchick
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Microflow photochemistry: UVC-induced [2 + 2]-photoadditions to furanone in a microcapillary reactor
Beilstein Journal of Organic Chemistry, 2013 [2 + 2]-Cycloadditions of cyclopentene and 2,3-dimethylbut-2-ene to furanone were investigated under continuous-flow conditions. Irradiations were conducted in a FEP-microcapillary module which was placed in a Rayonet chamber photoreactor equipped with ...
Sylvestre Bachollet +5 more
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