[EN] SUBSTITUTED PARA-BIPHENYLOXYMETHYL DIHYDRO OXAZOLOPYRIMIDINONES, PREPARATION AND USE THEREOF [FR] PARA-BIPHÉNYLOXYMÉTHYL-DIHYDRO-OXAZOLOPYRIMIDINONES SUBSTITUÉES, LEUR PRÉPARATION ET LEUR UTILISATION
Cyclization by Catalytic Ruthenium Carbene Insertion into C sp 3H Bonds
作者:Fermín Cambeiro、Susana López、Jesús A. Varela、Carlos Saá
DOI:10.1002/anie.201107344
日期:2012.1.16
A novel tandem Ru‐catalyzed carbene addition to terminal alkynes/insertion into CHbonds in alkynyl acetals, ethers, and amines has been accomplished under mild reaction conditions (see scheme; TMS=trimethylsilyl). This cascade provides an efficient approach to form complex spiro and fused bicyclic structures by 1,5‐ and 1,6‐hydride shift/cyclization sequences from vinylcarbene Ru intermediates.
Model systems for hydrogen atom abstraction from DNA
作者:Jonathan Griffiths、John A. Murphy
DOI:10.1039/c39910001422
日期:——
Addition of thiyl radicals to alkynes produces vinyl radicals that abstract hydrogen atoms from tetrahydrofurans and a tetrahydropyran mimicking the crucial stages of the action of the anti-tumour agents, neocarzinostatin, esperamicin and calicheamicin.
Model Studies for Damage to Nucleic Acids Mediated by Thiyl Radicals
作者:Jonathan Griffiths、John A. Murphy
DOI:10.1016/s0040-4020(01)88306-x
日期:1992.1
The ability of phenylthiovinyl radicals to abstract hydrogen from appropriately substituted carbon atoms has been studied as a model for the reactions of the deoxyribose units of DNA with similar radicals in vivo.
Synthesis of (Tetrahydrofuranyl)methyl-1,2,3-triazoles Through Alkyne–Azide Cycloaddition Catalyzed by a Dithioic Acid Copper(I) Complex
作者:Bayardo E. Velasco、Aydeé Fuentes、Carlos Gonzalez、David Corona、Iván García-Orozco、Erick Cuevas-Yañez
DOI:10.1080/00397911.2010.516052
日期:2011.10.15
(Tetrahydrofuranyl)methyl-1,2,3-triazoles were synthesized from tetrahydrofurfuryl tosylate and several alkynes in the presence of catalytic amounts of a 3-hydroxy-3-phenyl-2-propenendithioate-bis(triphenylphosphine) copper(I) complex. The reaction process is carried in out under mild conditions, and bases or reducing agents were not used. The reaction afforded the 1,4-regioisomers in excellent yields.
Mercuration-demercuration of 2-prop-2-ynyloxymethyltetrahydrofuran
作者:M. V. Balyan、L. M. Genjoyan、V. V. Hakobyan、N. G. Hobosyan、Zh. A. Chobanyan
DOI:10.1134/s1070363214110097
日期:2014.11
Mercuration-demercuration of 2-propyl-2-ynyloxymethyltetrahydrofuran with various nucleophiles has been investigated. Formation of products of hydration, alkylation at the substituted carbon atom of the triple bond, subsequent prototropic isomerization or intramolecular cyclization (giving diastereomeric dihydrofuran derivatives), and demercuration by hydrochloric acid has been demonstrated.