Bulletin of the Chemical Society of Japan p. 3069 - 3078 (1993)
Update date:2022-08-29
Topics:
Sato, Hiroshi
Noguchi, Takanobu
Yasui, Seimei
A new selective catalyst was developed for the dimerization of propylene to 2,3-dimethylbutenes (DMBS). It comprises five components: nickel naphthenate (Ni(naph)2)/AlEt3/PR3/diene/chlorinated phenol. Among them, chlorinated phenol is an essential component for activating the catalyst. Both the dimerization of propylene and the isomerization of the produced 2,3-dimethyl-1-butene (DMB-1) to 2,3-dimethyl-2-butene (DMB-2) are accelerated in proportion to the content of the chlorinated phenol as well as to the number of chlorine atoms on the chlorinated phenol. These effects are attributed to the Lewis acidity of the reaction product between AlEt3 and the chlorinated phenol. Thus, either DMB-1 or DMB-2 can be produced selectively by controlling the composition of the catalyst. The content of DMBS mainly depends upon the phosphine ligand; this ligand effect is discussed in terms of the 31P NMR chemical shift. A high content of DMBS of up to 85percent in propylene dimers was attained when phosphines with chemical shifts between 0 and -30 ppm were used.
View MoreZhejiang Sucon Silicone Co.,Ltd
Contact:+86-575-88046692
Address:Qisheng Rd., Paojiang Industrial Zone, Shaoxing, Zhejiang, China.
KINHENG CHEMICAL(SHANGHAI)CO., LTD.
Contact:+8621-60490170
Address:Room401, No.28,Lane 189, Yangshupu Rd. Shanghai, China.
Jiangsu Zenji Pharmaceuticals LTD
Contact:+86-025-83172562; +1-224-888-1133(USA)
Address:No.5 Xinmofan Road
Zhejiang Chemicals Import & Export Corporation
Contact:86-571-87043088
Address:No.37,Qingchun Road,Hangzhou,China
Nanjing Fayekong Chemcial Co.,Ltd(expird)
Contact:86-25-58813444
Address:Rm 1503, Unit 1, Building 5, Zijinnanyuan, Nanjing, Jiangsu, China
Doi:10.1016/j.carres.2021.108396
(2021)Doi:10.1006/jcat.1999.2566
(1999)Doi:10.1134/S1070428020100115
(2020)Doi:10.1021/jacs.6b09209
(2016)Doi:10.1016/S0040-4039(01)01332-6
(2001)Doi:10.1016/j.bmcl.2007.10.103
(2008)