66 results about "Sigma ligands" patented technology

The invention discloses methods and compositions useful for facilitating neuronal regeneration and functional recovery in neurodegenerative diseases. The methods and compositions utilize ligands for the sigma receptor, wherein the ligand is preferably AGY-94806, or salts, or solvates thereof. These molecules can be delivered alone or in combination with agents which treat or prevent neurodegenerative diseases such as those caused by multiple sclerosis. In other methods, the sigma receptor ligands are administered after MS to facilitate functional recovery. The administration of the sigma receptor ligands causes faster functional recovery.

A process for the preparation of a solid olefin polymerisation catalyst system, comprising an organometallic compound of a transition metal of Group 3 to 10 of the Periodic Table (IUPAC 2007) in the form of solid particles comprising the steps of I) generating an emulsion by dispersing a liquid clathrate in a solvent (S) wherein (i) the solvent (S) constitutes the continuous phase of the emulsion and comprises a nonreactive fluorinated synthetic oil having a viscosity at 20 DEG C according to ASTM D445 of at least 10 cSt up to 2000 cSt, (ii) the liquid clathrate constitutes in form of droplets the dispersed phase of the emulsion, II) solidifying said dispersed phase to convert said droplets to solid particles and III) optionally recovering said particles to obtain said catalyst system, wherein the liquid clathrate comprises (a) a lattice being the reaction product of a1); a transition metal compound of formula (I) LmRnTXq wherein T is a transition metal of anyone of the groups 3 to 10 of the periodic table (IUPAC2007), preferably a transition metal of anyone of the groups 4 to 6 of the periodic table (IUPAC2007), more preferably titanium (Ti), zirconium (Zr) or hafnium (Hf), i.e. zirconium (Zr) or hafnium (Hf), each X is independently a monovalent sigma-ligand, each L is independently an organic ligand which coordinates to the transition metal (T), R is a bridging group linking said organic ligands (L), m is 2 or 3, preferably 2, n is 0, 1 or 2, preferably 1, q is 1, 2 or 3, preferably 2, m+q is equal to the valency of the transition metal (T), a2) a cocatalyst comprising aluminoxane a3) a compound being effective to form the lattice with the transition metal compound and / or the aluminoxaneand b) a hydrocarbon solvent (HS).

Catalyst system for producing ethylene copolymers in a high temperature solution process, the catalyst system comprising (i) a metallocene complex of formula (I) wherein M is Hf or Zr X is a sigma ligand, L is a bridge of the formula —SiR82—, wherein each R8 is independently a C1-C20-hydrocarbyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl n is 0, 1 or 2 R1 and R1′ are the same or can be different and can be a linear or branched C1-C6-alkyl group, R2 and R2′ are the same or are different and are a CH2—R9 group, with R9 being H or linear or branched C1-C6-alkyl group R5 and R5′ are the same or are different and can be H or a linear or branched C1-C6-alkyl group or a OR group, wherein R is a C1-C6-alkyl group R6 and R6′ are the same or are different and can be H or a C(R10)3 group, with R10 being the same or different and R10 can be H or a linear or branched C1-C6-alkyl group or R5 and R6 and / or R5′ and R6′ taken together form an unsubstituted 4-7 membered ring condensed to the benzene ring of the indenyl moiety, with the proviso that if R5 and R6 as well as R5′ and R6′ taken together form an unsubstituted 5 membered ring condensed to the benzene ring of the indenyl moiety then R2 and R2′ are not a C1-alkyl group; and R7 and R7′ can be the same or are different and can be H or a linear or branched C1-C6-alkyl group (ii) an aluminoxane cocatalyst and (iii) optionally a boron containing cocatalyst.

Catalyst system for producing ethylene copolymers in a high temperature solution process, the catalyst system comprising (i) a metallocene complex of formula (I) wherein M is Hf X is a sigma ligand, L is a bridge of the formula —SiR82—, wherein each R8 is independently a C1-C20-hydrocarbyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl n is 0, 1 or 2 R1 and R1′ are the same or can be different and can be a linear or branched C1-C6-alkyl group, R2 and R2′ are the same or are different and are a CH2—R9 group, with R9 being H or linear or branched C1-C6-alkyl group R5 and R5′ are the same or are different and can be H or a linear or branched C1-C6-alkyl group or a OR group, wherein R is a C1-C6-alkyl group R6 and R6′ are the same or are different and can be H or a C(R10)3 group, with R10 being the same or different and R10 can be H or a linear or branched C1-C6-alkyl group or R5 and R6 and / or R5′ and R6′ taken together form an unsubstituted 4-7 membered ring condensed to the benzene ring of the indenyl moiety, and R7 and R7′ can be the same or are different and can be H or a linear or branched C1-C6-alkyl group (ii) an aluminoxane cocatalyst and / or (iii) a boron containing cocatalyst and (iv) optionally an aluminum alkyl compound.