Dalton Transactions p. 2581 - 2588 (2018)
Update date:2022-08-17
Topics:
Qi, Xinghao
Sun, Hongjian
Li, Xiaoyan
Fuhr, Olaf
Fenske, Dieter
The electron-rich silylene Co(i) chloride 5 was obtained through the reaction of CoCl(PMe3)3 with chlorosilylene. Complex 5 reacted with 1,3-siladiazole HSiMe(NCH2PPh2)2C6H4 to give the silylene Co(iii) hydride 6 through chelate-assisted Si-H activation. To the best of our knowledge, complex 6 is the first example of Co(iii) hydride supported by N-heterocyclic silylene. Complexes 5 and 6 were fully characterized by spectroscopic methods and X-ray diffraction analysis. Complex 6 was used as an efficient precatalyst for Kumada cross-coupling reactions. Compared with the related complex 3 supported by only trimethylphosphine, complex 6 as a catalyst supported by both chlorosilylene and trimethylphosphine exhibits a more efficient performance for the Kumada cross-coupling reactions. A novel catalytic radical mechanism was suggested and experimentally verified. As an intermediate silylene cobalt(ii) chloride 6d was isolated and structurally characterized.
View MoreNanJing KaiHeng Chemical CO., LTD.
Contact:+86-25-85768391
Address:RM.1704, D, WANDA PLAZA, NO.110, MIDDLE JIANGDONG ROAD, NANJING, CHINA
Beijing Merson Pharmaceutical Co., Ltd
Contact:0086-10-80484934 0086-10-80484574/
Address:2nd Floor , No. 2 Building , No. 14 Houshayu Duan, Jingmi Road ,Shunyi District , Beijing 101318, P.R.China
SICHUAN ZHONGBANG NEW MATERIAL CO., LTD
website:http://www.zhongbangst.com
Contact:86-830-2585019
Address:sichuan,china
website:http://www.simagchem.com
Contact:+86-592-2680277
Address:21/F Hualong Office Building,No.6 Hubin East Road, Xiamen,China
YanCheng LongShen Chemical Co.,Ltd.
Contact:+86-515-86668866
Address:No.13,Weiyi Road,Funing Aoyang Industrial Park
Doi:10.1016/0040-4039(90)80215-8
(1990)Doi:10.1021/ol501241a
(2014)Doi:10.1039/jr9540002622
(1954)Doi:10.1080/00397910500333225
(2006)Doi:10.1016/S0040-4039(00)79956-4
(1994)Doi:10.1021/ja01923a006
(1910)