Synthesis of a new class of 1, 4-bis (diphenylphosphino)-1, 3-butadiene bridged diphosphine, NUPHOS, via zirconium-mediated reductive coupling of alkynes and …
…, JG Knight, PA Champkin, W Clegg
文献索引：Doherty; Knight; Robins; Scanlan; Champkin; Clegg Journal of the American Chemical Society, 2001 , vol. 123, # 21 p. 5110 - 5111
Zirconium-mediated inter-and intramolecular reductive cyclization of alkynes and diynes with Negishi's reagent and transmetalation of the resulting zirconacyclopentadiene with copper chloride followed by quenching with chlorodiphenylphosphine has been used to prepare a new class of bidentate phosphine, NUPHOS, based on a four-carbon sp2- hybridized tether. Palladium complexes of these new diphosphines are highly active for ...
