Results 1 to 10 of about 92 (85)
Communications Chemistry, 2021 Preparation of cyclobutanes with four different substituents is rare and often arduous. Here a cocrystallisation strategy enables the intermolecular [2+2] cross-photoreaction of non-symmetrical stilbene derivatives to obtain chiral tetrasubstituted ...
Michael A. Sinnwell +4 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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The Synthesis of Functionalized Dimethylphosphinoyl Cyclopropanes and Cyclobutanes
Журнал органічної та фармацевтичної хімії, 2023 A simple preparative approach to a series of functionalized dimethylphosphinoyl-containing cyclopropanes and cyclobutanes has been developed; it is based on cyclocondensation of dimethylphosphinoyl acetonitrile with 1,2- and 1,3-dibromoalkanes. Synthetic
Anastasiia M. Aleksandrova +2 more
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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 +2 more
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Radical cation Diels–Alder reactions of arylidene cycloalkanes
Beilstein Journal of Organic Chemistry, 2022 TiO2 photoelectrochemical and electrochemical radical cation Diels–Alder reactions of arylidene cycloalkanes are described, leading to the construction of spiro ring systems.
Kaii Nakayama +2 more
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Nature Communications, 2020 Light-induced [2 + 2] cycloaddition is the most efficient way to generate cyclobutanes, while suffering from limitations of specific selectivity.
Jing-Si Wang +8 more
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Molecules, 2019 The coupling of 2-bromo-3-benzoyloxycyclobutanone with purine under basic conditions produces two regioisomers consisting of the N-7 and N-9 alkylated products in equal amounts in their racemic forms.
Noha Hasaneen +8 more
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Contemporary synthesis of bioactive cyclobutane natural products
Green Synthesis and Catalysis, 2023 Many cyclobutane natural products have intriguing biological properties that arise from their fascinating chemical structures. Cyclobutane natural products feature a cyclobutane scaffold as the core or as a part of the spirocyclic or fused cyclic core ...
Chunngai Hui +3 more
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Natural Product Communications, 2012 Optically active 1,3-bridged cyclobutanes 10 of the bicyclo[3.1.1]heptane ring system and 1,2-bridged cyclobutanes 11 of the bicyclo[3.2.0]heptane ring system were produced by UV irradiation of α,β,γ,δ-unsaturated esters 9a and 9c-f.
Kiyoshi Honda +6 more
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Molbank, 2021 The intermolecular [2 + 2]-photocycloaddition of the parent flavone molecule (4) as the triplet energy-accepting species and the electron-rich alkene 2, 3-dihydrofuran (5) was performed by visible-light-mediated triplet-sensitization with an iridium ...
Jens Lefarth +2 more
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