Directed ortho metalation reactions. Expedient synthesis of 3,3′-disubstituted 1,1′-bi-(2-phenols) (BIPOLS)
摘要:
Metalation-electrophile quench of the 1,1'-bi-(2-biphenol) bis OCONEt(2) and OMOM derivatives 1a-b provides a general route to 3,3'-disubstituted products 2a-b; dianionic ortho-Fries rearrangement of la furnishes, after acetylation, the 3,3'-bisamide 4 while Suzuki and Negishi cross coupling of 2a (E = I and ZnBr) affords 3,3'-diaryl derivatives 5a-b in good yields.
Catalyst components for the polymerization of olefins
申请人:Basell Poliolefine Italia S.r.l.
公开号:EP2803678A1
公开(公告)日:2014-11-19
A solid catalyst component for the polymerization of olefins comprising Mg, Ti, Cl and at least an electron donor compound which is the reaction product obtained by bringing into contact a Mg compound and a Ti compound having at least a Ti-halogen bond with an electron donor selected from specific diphenol derivatives.
MAGNESIUM DICHLORIDE-ETHANOL ADDUCTS AND CATALYST COMPONENT OBTAINED THEREFROM
申请人:BASELL POLIOLEFINE ITALIA S.R.L.
公开号:US20150266981A1
公开(公告)日:2015-09-24
Catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor of formula (I)
Where R
1
and R
2
, independently, are selected from hydrogen and C
1
-C
15
hydrocarbon groups, optionally contain an heteroatom selected from halogen, P, S, N, O and Si, which can be fused together to form one or more closed cycles and A is a bivalent bridging group.
CATALYST COMPONENTS FOR THE POLYMERIZATION OF OLEFINS
申请人:BASELL POLIOLEFINE ITALIA S.R.L.
公开号:US20160115261A1
公开(公告)日:2016-04-28
A solid catalyst component for the polymerization of olefins comprising Mg, Ti, Cl and at least an electron donor compound which is the reaction product obtained by bringing into contact a Mg compound and a Ti compound having at least a Ti-halogen bond with an electron donor selected from specific diphenol derivatives.