16495-22-0Relevant academic research and scientific papers
Synthesis and characterization of a new chiral phosphinothiol ligand and its palladium(II) complexes
Brugat, Nuria,Duran, Josep,Polo, Alfonso,Real, Julio,Alvarez-Larena, Angel,Piniella
, p. 569 - 577 (2007/10/03)
The chiral ligand (1-diphenylphosphino-3-benzyloxy)propane-2-thiol 3 has been prepared both in racemic and enantiomerically enriched (92% e.e.) form. Addition of 2 equiv. of ligand 3 to a solution of [Pd(PPh3)4] gave the diastereoisomeric bischelate complexes [Pd(phosphinothiolato)2] 4 which exhibit a cis-trans equilibrium in solution. Formation of the diastereoisomeric complexes 4 allows the determination of the enantiomeric purity of ligand 3 by 31P NMR spectroscopy. Addition of 1 equiv. of ligand 3 to a solution of [PdCl2(PPh3)2] gave the enantiomeric complexes [PdCl(phosphinothiolate)(PPh3)] 5, which can be converted to the bischelate complexes 4 by addition of a second equivalent of ligand 3. This process allows the selective preparation of the two diastereoisomeric forms of complex 4.
Applications of Cyclic Sulfates of vic-Diols: Synthesis of Episulfides, Olefins, and Thio Sugars
Calvo-Flores, Francisco G.,Garcia-Mendoza, Pilar,Hernandez-Mateo, Fernando,Isac-Garcia, Joaquin,Santoyo-Gonzalez, Francisco
, p. 3944 - 3961 (2007/10/03)
A new efficient and expeditious one-pot synthesis of thiiranes and olefins from cyclic sulfates of inc-diols is described. Opening of cyclic sulfates with potassium thioacetate or potassium thiocyanate followed by treatment with sodium methoxide led to ep
