Hydroselenation of Alkynes by Lithium Butylselenolate: An Approach in the Synthesis of Vinylic Selenides
作者:Gilson Zeni、Marcelo P. Stracke、Cristina W. Nogueira、Antonio L. Braga、Paulo H. Menezes、Helio A. Stefani
DOI:10.1021/ol0498904
日期:2004.4.1
Vinylicselenides were prepared in good yields by hydroselenation of alkynes with lithium butylselenolate generated by reaction of n-butyllithium with elemental selenium. The regio- and stereochemistry of the hydroselenation depend on the nature of the substituents bonded to the alkyne.
Aerobic oxidative alkynylation of H-phosphonates and amides: an efficient route for the synthesis of alkynylphosphonates and ynamides using a recyclable Cu–MnO catalyst
作者:Harshvardhan Singh、Tapan Sahoo、Chiranjit Sen、Sunil M. Galani、Subhash Chandra Ghosh
DOI:10.1039/c9cy00275h
日期:——
and efficient route for the synthesis of alkynylphosphonates and ynamides by aerobic oxidative alkynylation of H-phosphonates and amides with both aliphatic and aromatic alkynes using our synthesized recyclable heterogeneous Cu–MnO catalyst has been developed. The phosphorylation was carried out under base- and ligand-free conditions, and in the presence of air as the sole oxidant. The reaction is compatible
Novel addition reactions of titanacycle phosphonates by tuning of Ti(O-i-Pr)4/2i-PrMgClElectronic supplementary information (ESI): further experimental details. See http://www.rsc.org/suppdata/cc/b2/b209149f/
作者:Abed Al Aziz Quntar、Morris Srebnik
DOI:10.1039/b209149f
日期:2003.12.19
Di- or tri-substituted vinylphosphonates, 2–5, can be obtained in a highly regio- and stereoselective manner from 1-alkynylphosphonates, by manipulation of Ti(O-i-Pr)4/2i-PrMgCl.
Ruthenium-Catalyzed [2 + 2] Cycloadditions of Bicyclic Alkenes with Alkynyl Phosphonates
作者:Neil Cockburn、Elham Karimi、William Tam
DOI:10.1021/jo9010206
日期:2009.8.7
Ruthenium-catalyzed [2 + 2] cycloadditions of bicyclic alkenes with alkynyl phosphonates were investigated. The phosphonate moieties were found to be compatible with the Ru-catalyzed cycloadditions giving the corresponding cyclobutene cycloadducts in low to excellent yield (up to 96%). Alkynyl phosphonates showed lower reactivity than other heteroatom-substituted alkynes such as alkynyl halides, ynamides
Ruthenium-Catalyzed Homo Diels–Alder [2 + 2 + 2] Cycloadditions of Alkynyl Phosphonates with Bicyclo[2.2.1]hepta-2,5-diene
作者:Tanner J. Kettles、Neil Cockburn、William Tam
DOI:10.1021/jo2010928
日期:2011.8.19
Ruthenium-catalyzed homo Diels–Alder [2 + 2 + 2] cycloadditions between alkynyl phosphonates and bicyclo[2.2.1]hepta-2,5-diene were studied. The observed reactivity was found to be dependent on the presence of the phosphonate moiety. The Ru-catalyzed cycloaddition was compatible with a variety of aromatic and aliphatic substituted alkynyl phosphonates, providing the corresponding phosphonate substituted