Results 21 to 30 of about 4,067 (210)
The Metallacyclopentane-Olefin Interchange Reaction [PDF]
, 1977 Tris(triphenylphosphine)tetramethylenenickel(II) and biscyclopentadienyltetramethylenetitanium, prepared from the reaction of a 1,4-dilithiobutane and the transition metal dihalides react with olefins to produce substituted metallacyclopentanes; the ...
Grubbs, Robert H., Miyashita, Akira
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Characterization and Dynamics of Substituted Ruthenacyclobutanes Relevant to the Olefin Cross-Metathesis Reaction [PDF]
, 2011 The reaction of the phosphonium alkylidene [(H_(2)IMes)RuCl2═CHP(Cy)_3)]^(+) BF_(4)^− with propene, 1-butene, and 1-hexene at −45 °C affords various substituted, metathesis-active ruthenacycles. These metallacycles were found to equilibrate over extended
Blake, Garrett +3 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
doaj +1 more source
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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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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Cyclopropyl and cyclobutylboronates and silanes: A stereoselective approach [PDF]
, 2018 Chiral cyclopropyl- and cyclobutylboronic esters and -silanes have become attractive intermediates for the preparation of functionalized small rings.
Martín-Heras, Víctor +2 more
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Molecules, 2022 The ditopic halogen-bond (X-bond) donors 1,2-, 1,3-, and 1,4-diiodotetrafluorobenzene (1,2-, 1,3-, and 1,4-di-I-tFb, respectively) form binary cocrystals with the unsymmetrical ditopic X-bond acceptor trans-1-(2-pyridyl)-2-(4-pyridyl)ethylene (2,4-bpe ...
Jay Quentin +2 more
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Vinylene-Linked Covalent Organic Frameworks by Base-Catalyzed Aldol Condensation [PDF]
, 2019 Two 2D covalent organic frameworks (COFs) linked by vinylene (−CH=CH−) groups (V‐COF‐1 and V‐COF‐2) are synthesized by exploiting the electron deficient nature of the aromatic s‐triazine unit of C3‐symmetric 2,4,6‐trimethyl‐s‐triazine (TMT).
Acharjya, Amitava +4 more
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Synthesis of functionalized tryptamines by Brønsted acid catalysed cascade reactions [PDF]
, 2015 An original synthetic protocol has been developed for the preparation of highly functionalized tryptamines from 2-hydroxycyclobutanone and secondary arylamines via a solvent-free Brønsted acid catalysed two-step reaction ...
Aitken, David J +4 more
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Phytochemical Constituents of Combretum Loefl. (Combretaceae) [PDF]
, 2013 Combretum is the largest and most widespread genus of Combretaceae. The genus comprises approximately 250 species distributed throughout the tropical regions mainly in Africa and Asia.
Dawe, Amadou +3 more
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