A novel and convenient approach to the synthesis of various tertiary phosphines via a copper-catalyzed cross-coupling of (hetero)aromatic bromide with secondary phosphines has been developed. The reaction employs cheap copper as the catalyst, 2,6-bis( N -methylaminomethyl)pyridine ( L4 ) as a perfect ligand and KO t Bu as a base; all reactions are carried out under argon atmosphere. A variety of sterically
New cyclopentadienylethylphosphane chelate complexes with unsymmetrical phosphane substitution
作者:Karin Janssen (née Kirleis)、Holger Butenschön
DOI:10.1039/c1nj20292h
日期:——
results in the formation of products with three stereogeniccenters at phosphorus, cobalt, and silicon, which show dynamic behavior as indicated by VTNMR. The rhodium chelate complex undergoes oxidative addition of iodomethane with diastereoselective formation of the respective Rh(III) chelate. While diastereoselectivity caused by a planar chiral indenyl ligand or by a stereogenic carbon center in the chelate
PREPARATION OF FUNCTIONAL POLYMERS USING PHOSPHIDE INITIATORS
申请人:Bridgestone Corporation
公开号:EP2831128B1
公开(公告)日:2016-11-30
STEREOREGULAR DIBLOCK POLYBUTADIENES HAVING A 1,4-CIS/SYNDIOTACTIC 1,2 STRUCTURE FROM STEREOSPECIFIC POLYMERIZATION
申请人:Versalis S.p.A.
公开号:EP3066139A1
公开(公告)日:2016-09-14
Preparation Of Functional Polymers Using Phosphide Initiators
申请人:Bridgestone Corporation
公开号:US20150065673A1
公开(公告)日:2015-03-05
A method of preparing a polymer, the method comprising: metalating an organophosphine compound in the substantial absence of monomer to form a metalated organophosphine; and introducing the metalated organophosphine to monomer including conjugated diene monomer to form a reactive polymer.