Polymer masterbatch compositions, the production and use thereof, as well as vulcanizable rubber compounds comprising these masterbatch compositions, and their use for the production of moldings in the production of tires.
Polymer masterbatch compositions, the production and use thereof, as well as vulcanizable rubber compounds comprising these masterbatch compositions, and their use for the production of moldings in the production of tires.
Differentially Substituted Phosphines via Decarbonylation of Acylphosphines
作者:Rongrong Yu、Xingyu Chen、Stephen F. Martin、Zhiqian Wang
DOI:10.1021/acs.orglett.7b00579
日期:2017.4.7
A new route to phosphines was developed by a method that features a “pre-join and transform” process that proceeds via acylphosphine intermediates that may be readily prepared from carboxylic acids and disubstituted phosphines. The efficient decarbonylations of these acylphosphines using a nickel catalyst delivered the corresponding phosphines. This method shows that the carboxyl group can play a role
of different ruthenium precursors, the hydrogenation of sodium bicarbonate (NaHCO3) to sodium formate (NaHCO2) proceeded with good catalyst turnover numbers in the range of 1300–1600 at 80 °C and a total pressure of hydrogen of 60 bar in the absence of amines or other additives. Similarly, catalytic hydrogenations of carbon dioxide, cinnam‐, and benzaldehyde were possible with these new ruthenium complexes
Hydrogenation of a benzeneruthenium chloride dimer in the presence of novel acylphosphine (phosphomide) ligands resulted in the formation of corresponding ruthenium(II)–benzyl phosphine complexes. Here, selective reduction of the carbonyl group to a methylene unit takes place with molecular hydrogen under mild conditions in good yield. This approach provides an alternative synthesis of ruthenium phosphine