| 摘要 |
Compounds 1,3,4-(SiMe3)(C6F5)(alkyl)C5H3 are made using a simplified synthetic strategy which is readily scalable. On reaction with a suitable transition metal species, a 1,3,4-(SiMe3)(C6F5)(alkyl)C5H3 molecule provides an organotransition metal complex comprising a 1,2-(C6F5)(alkyl) substituted cyclopentadienyl ligand, which is active toward olefin polymerization. |
| 主权项 |
1. A method for making the compound 1,3,4-(SiMe3)(C6F5)(R)C5H3 without isolating intermediates, said method comprising the following steps:
Step 1) in the presence of an ethereal solvent, combining perfluorobenzene C6F6, a metal cyclopentadienide [M1][C5H5] and a first base M2B1 to form a first reaction mixture comprising [M1/M2][C6F5)C5H4]; Step 2) combining at least 2 molar equivalents of CISiMe3 with said first reaction mixture to give a second reaction mixture comprising 1,3-(SiMe3)(C6F5)C5H4; Step 3) combining a second base M3B2 with said second reaction mixture to give a third reaction mixture comprising [M1/M2/M3][1,3-(SiMe3)(C6F5)C5H3]; Step 4) combining a compound RX with said third mixture to give a fourth reaction mixture comprising 1,3,4-(SiMe3)(C6F5)(R)C5H3;
wherein M1, M2, M3 are the same or different metal selected from the group consisting of Li+, Na+ and K+; B1 and B2 are the same or different base selected from the group consisting of hydride, alkylide, amide and alkoxide; R is a primary or secondary alkyl group which may be substituted by one or more heteroatom or heteroatom group; and X is a halide group or a sulfonate group. |
