| Patent Number |
Title Of Patent |
Date Issued |
| RE38683 |
Preparation of titanocenes |
January 4, 2005 |
| A method for producing dialkylsilyl.Iadd.bis.Iaddend.(2-alkyl-4-aryl indenyl) titanocenes including rac-Me.sub.2 Si.Iadd.bis.Iaddend.(2-methyl-4-phenylindenyl)-titanium dichloride is described. |
| 6642402 |
Synthesis of bis (cyclopentadienyl) and bis (indenyl) ruthenium complexes |
November 4, 2003 |
| A process for preparing a cyclopentadienyl or indenyl ruthenium complex by treatment of a cyclopentadienyl or indenyl compound with ruthenium trichloride dihydrate and magnesium powder in an alkanol at 10.degree. C. to -30.degree. C. is described. |
| 6590114 |
Conversion of cyclopentadienyl silyl amines to organometallic complexes comprising titanium bisa |
July 8, 2003 |
| Conversion of cyclopentadienyl or indenyl compounds to titanium organometallic complexes by treatment with titanium tetraalkoxides is described. |
| 6531619 |
Preparation of cyclopentadienyl or indenyl titanium trihalides |
March 11, 2003 |
| Cyclopentadienyl or indenyl titanium trichlorides are produced by converting a cyclopentadiene or an indene to a corresponding cyclopentadienyl or indenyl titanium trialkoxide which is treated with a halogenating agent to provide the desired cyclopentadienyl or indenyl titanium trich |
| 6465700 |
Coupling reactions of 2-substituted, 7-haloindenes with aryl substituents to produce metallocene |
October 15, 2002 |
| Novel 2-substituted 7-haloindenes and methods for synthesizing such indenes are described. The 2-substituted 7-haloindenes may be coupled with any aryl group to produce a metallocene catalyst intermediate. |
| 6455719 |
Constrained geometry ligands and complexes derived therefrom |
September 24, 2002 |
| A novel constrained geometry titanium(II) diene complex and ligands of such complexes are described. The novel complex has an olefin polymerization activity substantially in excess of a defined activity standard characteristic of analogous prior art constrained geometry diene complex |
| 6452031 |
Preparation of titanium organometallic complexes comprising a titanium bisalkoxide or dihalide m |
September 17, 2002 |
| Conversion of a ligand of titanium organometallic complex to a titanium bisalkoxy or a titanium dichloride is described. |
| 6444835 |
Titanocene synthesis |
September 3, 2002 |
| A method for producing a titanocene wherein a TiCl.sub.3 complex free from salts of metals other than titanium is reacted with a titanocene ligand. |
| 6407289 |
Synthesis of N4, N4-diphenyl-N4,N4-di-m-tolyl-biphenyl-4,4'-diamine from an unsymmetrical amine |
June 18, 2002 |
| Novel (4-halophenyl) biphenyl tolyl amines are described. |
| 6388151 |
Synthesis of Tetraalkylcyclopentadienes |
May 14, 2002 |
| A method for synthesizing tetramethylcyclopentadiene from 2,3-dibromobutane is described. A 2-bromo-2-butene Grignard is reacted with an ethyl formate to produce a 3,5-dimethyl-2,5-heptadiene-4-ol magnesium bromide which is then quenched with acetic acid to produce 3,5-dimethyl-2,5-hepad |
| 6307063 |
Conversion of compounds of titanium in a plus 4 oxidation state to titanium compounds in a plus |
October 23, 2001 |
| The reduction of a titanium tetrahalide with titanium in the presence of an ether which forms an adduct with titanium trihalide, wherein an adduct insoluble in said ether is produced. |
| 6225506 |
Synthesis of alkene-2-ones |
May 1, 2001 |
| A method for synthesizing an alkyl-2-one by reacting a 2-alkene halide with a 2,4-alkanedione in an alkylene glycol medium having a boiling point higher than said alkene-2-one is described. |
| 6175027 |
Synthesis of bis (alkyl cyclopentadienyl) metallocenes |
January 16, 2001 |
| A method for producing an alkyl cyclopentadiene by reacting cyclopentadienyl Grignard with an alkyl halide and for converting the alkyl cyclopentadiene to a bis(n-alkyl cyclopentadienyl) Group IV metal dihalide is described. |
| 6124489 |
Preparation of bis aryl cyclopentadienyl Group IVA metal dihalides |
September 26, 2000 |
| Production of aryl cyclopentadienyl Group IVA metal dihalides by dehydrogenation of a substituted or unsubstituted bis-(cyclohexenylcyclopentadienyl) Group IVA metal dihalide is described. |
| 6075171 |
2-substituted 7-haloindenes and methods for synthesizing |
June 13, 2000 |
| Novel 2-substituted 7-haloindenes and methods for synthesizing such indents are described. The 2-substituted 7-haloindenes may be coupled with any aryl group to produce a metallocene catalyst intermediate. |
| 6015916 |
Constrained geometry metallocene catalyst complexes |
January 18, 2000 |
| A practical and scalable process for the synthesis of constrained geometry metallocene catalyst is described. |
| 5847176 |
Preparation of chiral titanocenes |
December 8, 1998 |
| A method for producing dialkylsilyl (2-alkyl-4-aryl indenyl) titanocenes including rac-Me.sub.2 Si(2-methyl-4-phenylindenyl)-titanium dichloride is described. |
