Solid State Polymerization Process for Polyester with Phosphinic Acid Compounds
申请人:Odorisio Paul
公开号:US20130035451A1
公开(公告)日:2013-02-07
Disclosed are phosphinic acid compounds of formula I, II or III
where R
1
and R
1
′ are for instance straight or branched C
1
-C
50
alkyl, R
2
is for instance straight or branched C
22
-C
50
alkyl, R
3
and R
3
′ are for instance straight or branched C
1
-C
50
alkyl, R
4
is for instance straight or branched C
1
-C
50
alkylene and m is from 2 to 100. Also disclosed are polyester compositions comprising the compounds of formula I, II and III.
economical phosphorylation of thiols has been achieved via halogen- and metal-free K2CO3-promoted aerobic oxidative cross-coupling of trialkyl phosphites, dimethyl phenylphosphonite, or methyl diphenylphosphinite with thiophenols using air as the oxidant at room temperature. This transformation provides a straightforward route to the construction of phosphorus–sulfur bonds with wide functional group compatibility
通过在室温下使用空气作为氧化剂,通过无卤和无金属的K 2 CO 3促进亚磷酸三烷基酯,二甲基苯基亚膦酸酯或甲基二苯基亚膦酸酯与硫代苯酚的需氧氧化交叉偶联,实现了硫醇的便捷,实用和经济的磷酸化。这种转变为构建具有广泛官能团相容性的磷硫键提供了一条简单的途径,该方法可提供高达94%的收率的硫代磷酸酯。
Direct Conversion of Phosphonates to Phosphine Oxides: An Improved Synthetic Route to Phosphines Including the First Synthesis of Methyl JohnPhos
作者:Alexander J. Kendall、Chase A. Salazar、Patrick F. Martino、David R. Tyler
DOI:10.1021/om500854u
日期:2014.11.10
reaction intermediate. A diverse array of phosphonates was converted to phosphine oxides using a variety of Grignard reagents for direct carbon–phosphorus functionalization. This new methodology especially simplifies the synthesis of dimethylphosphino (RPMe2)-type phosphines by using air-, water-, and silica-stable intermediates. To highlight this reaction, a new Buchwald-type ligand ([1,1′-biphenyl]-
Multihydrido-complexes of osmium and related complexes
作者:P. G. Douglas、B. L. Shaw
DOI:10.1039/j19700000334
日期:——
A new route to tetrachloro-complexes of the type trans-[OsCl4L2] from mer-[OsCl3L3](L = tertiary phosphine or tertiary arsine) is described, which involves treatment with chlorine in the presence of light. The tetrachloro-osmium(III) complex trans-[OsCl4(PMe2Ph)2] reacts with tertiary phosphines, tertiary arsines, alkyl phosphites, or alkyl phosphonites (L′) to give [OsCl3(PMe2Ph)2L′]. Reduction of
Interconversion of methyl and acetyl complexes and isomerization of acetyl complexes of ruthenium(II)
作者:Christopher F. J. Barnard、J. Anthony Daniels、Roger J. Mawby
DOI:10.1039/dt9790001331
日期:——
initial intramolecular combination of methyl and carbonyl ligands followed by attack by L′trans to the newly formed acetyl ligand, which has a strong trans-directing effect. The trans-labilizing influence of the acetyl ligand makes the Ru–L′ bond in (II) extremely labile, and hence the reactions are easily reversed, regenerating (I). In many instances the products (II) undergo a slower rearrangement to