Highly stereo- and regiocontrolled cyclopentannulation via allylphosphonate conjugate addition and hydroboration-oxidation-elimination. Synthesis of pentalenic acid with virtually complete stereo- and regiocontrol
Copper (II)-catalyzed regio- and stereoselective addition of H/P(O)R2 to alkynes
作者:Inna G. Trostyanskaya、Irina P. Beletskaya
DOI:10.1016/j.tet.2014.02.037
日期:2014.4
catalyst for β-E regio- and stereoselective syn-addition of the H–P(O)-bond of diphenylphosphine oxide, H-phosphinates, dialkylphosphites to various alkynes in the synthesis of P(O)-containing alkenes. Without additives and ligands Cu(II)-compounds showed better results than CuI or Ni(acac)2. The catalytic system developed is tolerant to typical organic functional groups present in the alkynes and to the
[EN] METHODS OF REDUCING VIRULENCE IN BACTERIA<br/>[FR] PROCÉDÉS DE RÉDUCTION DE LA VIRULENCE DE BACTÉRIES
申请人:UWM RES FOUNDATION INC
公开号:WO2011103189A1
公开(公告)日:2011-08-25
A method of reducing virulence in a bacterium comprising at least one of a GacS/GacA-type system, a HrpX/HrpY-type system, a T3SS-type system, and a Rsm-type system, the method comprising contacting the bacterium with an effective amount of a compound described herein.
A Convenient Selenium‐Linking Strategy for Traceless Solid‐Phase Synthesis of Diethyl 1‐Alkenephosphonates
作者:Shou‐Ri Sheng、Wei Zhou、Xiao‐Ling Liu、Cai‐Sheng Song
DOI:10.1081/scc-120028631
日期:2004.12.31
Abstract Treatment of a novel polymer‐supported α‐diethoxyphosphoryl methyl selenide with LDA followed by alkylation and oxidative deselenation efficiently afforded diethyl trans‐1‐alkenephosphonates in good yields and purities.
A Novel Approach to γ-Hydroxy-α,β-unsaturated
Compounds
作者:Henryk Krawczyk、Katarzyna Wąsek、Jacek Kędzia
DOI:10.1055/s-0028-1083162
日期:——
A simple synthesis of (E)-alk-1-enyl mesylates from (E)-alk-1-enylphosphonates is reported. Construction of γ-hydroxy-α,β-unsaturated compounds was achieved by a two-step process involving dihydroxylation of the enol mesylates followed by HWE reaction of the resulting α-hydroxy aldehydes with activated methylphosphonates. Enantioselective synthesis of the title compounds is also reported.
Coupling Reactions of α-Bromoalkenyl Phosphonates with Aryl Boronic Acids and Alkenyl Borates
作者:Yuichi Kobayashi、Anthony D. William
DOI:10.1021/ol020167s
日期:2002.11.1
arylation and alkenylation of the alpha-bromoalkenyl phosphonates were investigated with organoboranes and -borates. Arylation was successful with the aryl boronicacids and a palladium catalyst, while alkenylation was found to proceed with alkenyl borates and a nickel catalyst. In addition, an intramolecular Diels-Alder reaction of the diene prepared by the alkenylation afforded the corresponding adduct