Journal of the Chemical Society, Dalton Transactions p. 2723 - 2728 (1988)
Update date:2022-08-04
Topics:
Van Westrenen, Jeroen
Peters, Joop A.
Kieboom, Antonius P. G.
Van Bekkum, Herman
The lanthanum(III)-catalysed addition of glycolate to maleate to yield carboxymethoxysuccinate(3-) (cmos) is described. It is shown that the reaction only proceeds above pH 6, indicating the formation of di-ionised glycolate as a pre-equilibrium for the rate-limiting step, i.e. the addition of the CH2-O- to the olefinic bond. Due to strong complexation of LaIII by the product cmos, the reaction requires one LaIII ion per two cmos formed. The inhibitory effects of non-reacting strong chelators such as ethylenediaminetetra-acetate, nitrilotriacetate, and 2,6-pyridinedicarboxylate indicate the formation of mixed-ligand complexes leading to the addition reaction. This has been confirmed by GdIII-induced 13C relaxation rate enhancements, and DyIII-induced 17O shift measurements.
View MoreShandong Shouguang Songchuan Industrial Additives Co.,Ltd
Contact:+86-536-8566856
Address:Shouguang,Shandong,China
Jiangxi Lanqi Fine Chemical S&T Co., Ltd.
Contact:+86-21-64891143
Address:XinJiShan Industrial Area, Zhangshu City, JiangXi Province, China
website:http://www.oceanchem-group.com
Contact:86-536-8596048
Address:9th floor,Building B future Plaza, No.88.Fenghuang Street,Weifang,Shandong,China
Shenzhen Sungening Medicine Co., Ltd
Contact:+86-871-65110906
Address:Room702, Building 2, 365 Dianchi Road, Kunming, Yunnan Province, P.R. China
NINGBO YINLIANG FOREIGN TRADE CO., LTD.
Contact:+86-574-87834016 / 87898057
Address:23F NO.666JINYU ROAD,YINGZHOU DISTRICT,NINGBO.CHINA
Doi:10.1055/s-2006-950204
(2006)Doi:10.1016/S0022-328X(00)82443-2
(1981)Doi:10.1248/cpb.13.22
(1965)Doi:10.1021/ic0000810
(2000)Doi:10.1023/A:1020809814260
(2002)Doi:10.1016/j.jorganchem.2004.06.035
(2004)
