Catalyst- and solvent-free hydrophosphination and multicomponent hydrothiophosphination of alkenes and alkynes
作者:Yanina Moglie、María José González-Soria、Iris Martín-García、Gabriel Radivoy、Francisco Alonso
DOI:10.1039/c6gc00903d
日期:——
The hydrophosphination of carbon-carbon multiple bonds has been generally performed under acid, base or metal catalysis in different solvents. Herein, alkyl and alkenyl tertiary phosphines are obtained by the addition...
GEMINI VITAMIN D3 COMPOUNDS AND METHODS OF USE THEREOF
申请人:Adorini Luciano
公开号:US20080280859A1
公开(公告)日:2008-11-13
The invention provides Gemini vitamin D
3
compounds, methods for using the compounds to treat vitamin D3 associated states and pharmaceutical compositions containing the compounds.
Experimental and theoretical studies on nickel–zinc-catalyzed cross-coupling of <i>gem</i>-dibromoalkenes with P(O)–H compounds
作者:Liu Leo Liu、Ye Lv、Yile Wu、Xiang Gao、Zhiping Zeng、Yuxing Gao、Guo Tang、Yufen Zhao
DOI:10.1039/c3ra45212c
日期:——
A new stereoselective one-pot protocol for the preparation of E-alkenyl-phosphorus compounds under catalysis of an inexpensive nickel–zinc catalyst system has been developed, which provides a potential useful method for C–P bond formation.
Nickel(II)-Magnesium-Catalyzed Cross-Coupling of 1,1-Dibromo-1-alkenes with Diphenylphosphine Oxide: One-Pot Synthesis of (<i>E</i>)-1-Alkenylphosphine Oxides or Bisphosphine Oxides
A novel nickel(II)‐magnesium‐mediated cross‐coupling of diphenylphosphine oxide with a variety of 1,1‐dibromo‐1‐alkenes has been developed, which provides a powerful and general methodology for the stereoselectivesynthesis of various (E)‐1‐alkenylphosphine oxides or bisphosphine oxides, with operational simplicity of the procedure, good to high yields and broad substrate applicability. Mechanistic
of α,β-unsaturated phosphine oxide derivatives using a silylboronic ester as the silicon pronucleophile is reported. The reaction is catalyzed by copper salts in the presence of chiral pyridine–oxazoline (PyOx) ligands. Good to high enantioselectivities (≤95% ee) are obtained for β-aryl-substituted acceptors whereas alkyl residues in the β-position led to a lower ee value for 1° and no reaction for