Journal of Organometallic Chemistry p. 225 - 234 (1997)
Update date:2022-08-03
Topics:
Halterman, Ronald L.
Ramsey, Timothy M.
The coupling of enantiomerically enriched 2,2′-dilithio-1,1′-binaphthyl with various annulated cyclopentenones or 2-indanone proves to be a facile route for the preparation of a series of annulated bis(cyclopentadienes) or bis(indenes) bridged at a symmetrical cyclopentadienyl position. The six-or seven-membered annulated bis(tetrahydroindene) 6 or bis(hexahydroazulene) 7 ligands could readily be converted to titanium or zirconium dichloride complexes. Owing to the symmetry of the ligands, only a single C2-symmetrical isomer of the metallocene dichloride could form. Although the faces of the cyclopentadienyl moieties are homotopic, the chiral bridge enforces a chiral conformation of the metallocene complexes. The bis(indenyl) 5 or five-membered annulated bis(tetrahydropentalene) 8 ligands could not be metalated. Unbridged 2-methyl and 2-phenyl substituted tetrahydropentalenes 27 and 28 were prepared and could readily be converted to titanium dichloride complexes.
View MoreShandong LuZhou Amino Acid Co., Ltd
Contact:86-539-2218025
Address:yishui economic and technical development zone zhenxing south road
Contact:0510-85393305
Address:1619 Huishan Avenue, Huishan District, Wuxi,
Contact:+86-10-59484199
Address:No.58-A1026 Liangguan Street
Contact:+86-18200374913
Address:Hongmei Road, No. 99
Shanghai Norky Pharmaceutical Co., LTD.
website:http://www.norkypharm.com
Contact:86-21-61075300
Address:1165 Jiangning Road, Office 1502, Shanghai, China
Doi:10.1021/jo01307a039
(1980)Doi:10.1021/jo01308a019
(1980)Doi:10.1002/adsc.202100234
(2021)Doi:10.1016/S0022-1139(00)81469-4
(1980)Doi:10.1002/jps.2600690237
(1980)Doi:10.1016/S0040-4039(01)85563-5
(1980)