Journal of Organometallic Chemistry p. 131 - 138 (1993)
Update date:2022-08-23
Topics:
Mashima, Kazushi
Yamanaka, Yoshimichi
Gohro, Yoshihiko
Nakamura, Akira
Treatment of Cp*TaCl4 with 4 equiv of phenylallylMgBr in THF afforded Cp*Ta(1-phenylallyl)2 (2), whose structure was characterized by a single crystal X-ray study as 16-electron two legged piano stool with two allyl moieties in supine-supine geometry.In this reaction, the starting TaV complex was reduced to a TaIII species accompanying the formation of reductive allyl-coupling products, diphenyl-1,5-hexadiene derivatives 3. ?-Donor molecules such as carbon monoxide, tert-butyl isocyanide, isocyanates and isothiocyanates induced the coupling reaction of two phenylallyl groups on tantalum to give 1,6-diphenyl-1,5-hexadiene (3a).The intermediate Cp*Ta(tert-BuNC)2(η2,η2-1,6-diphenyl-1,5-hexadiene) (5) was characterized by 1H NMR spectroscopy.Complex 2 was the catalyst precursor for the selective dimerization of isocyanates.Oxygen donor molecules such as DMSO and pyridine-N-oxide reacted with 2 to afford 1:1 adducts.One-electron oxidation of 2 with ferrocenium cation resulted in the formation of 1-phenyl-1-propene.The TaIV complexes,
Shijiazhuang Xinsheng Chemical Co., Ltd
Contact:+86-311-85965567
Address:Dongyang industry zone,xinle
Wuhan Kemi-Works Chemical Co., Ltd
website:http://www.kemiworks.com
Contact:86-27-85736489
Address:Rm. 1503, No. 164, Jianghan North Rd., Wuhan, 430022 China
Wuxi Morality Chemical Co., Ltd
Contact:
Address:B/7F, 321th WuYun Rd, Wanda Plaza, Wuxi City, 214174, China
Jiangxi Hito Chemical Co., Ltd.
Contact:+86-792-3170318
Address:No. 6, Tianhong Ave., Xinghuo Industry Park, Yongxiu, Jiujiang, Jiangxi, China
Jiaxing Anrui Material Technology Co., Ltd.
Contact:86-573-82651652 13305832579
Address:Room 407, Technology Building, 1369 Chennan Road, Jiaxing City, Zhejiang, China
Doi:10.1021/ja01015a076
(1968)Doi:10.1021/jm00019a002
(1995)Doi:10.1002/hlca.19380210147
(1938)Doi:10.1002/chem.201303828
(2013)Doi:10.1007/BF00598285
(1989)Doi:10.1021/ja01015a010
(1968)