Collection of Czechoslovak Chemical Communications p. 472 - 486 (1992)
Update date:2022-08-03
Topics:
Cefelin, Pavel
Hrudkova, Hana
Janout, Vaclav
Kalchenko, Vitalii I.
Valter, Bohumir
The efficiency of polymer analogues of oligo(oxyethylene)s and sulfoxides in the activation of nucleophilic substitution reactions were compared by testing to the reaction between sodium phenoxide and 1-bromooctane in 1,4-dioxane.With polymer analogues of crown ethers and polymer networks having the pseudo-crown ether structure the polymer effect can be achieved, i.e. a higher activation efficiency of the polymer analogue (in the L-S system) compared with the efficiency of the unimmobilized compound (in the homogeneous system).The results suggest that several molecules of the linear activator or of side active groupings (chains) on the polymer having the podand structure take part in the formation of the activation site (for the complex formation or solvation of the cation).
View Moreqingdao goldenchem imp and exp co.,ltd.
Contact:532-55579246
Address:no.62 ,haier road laoshan distirct
SHANGHAI T&W PHARMACEUTICAL CO., LTD.
website:http://www.trustwe.com
Contact:+86-21-61551611
Address:601, No. 1, 2277 Nong, Zu Chongzhi Road, Zhangjiang Hightech. Park, Pudong
Contact:+86-513-80923002
Address:Suzhou Road 8,Beixin,Qidong,Jiangsu province,P.R.226221,China
Huludao Tianqi Shengye Chemical Co.,Ltd.
Contact:0086 429 2075777
Address:Area B,Shipbuilding Industry Park,Beigang District,Huludao City,Liaoning prov.,China
CHANGZHOU HANGYU PHARMACEUTICAL TECHNOLOGY CO., LTD
website:http://www.czyys.com
Contact:0086-519-88802789
Address:No.300,Yanling Middle Road, Changzhou, Jiangsu, China
Doi:10.1021/acs.joc.5b02624
(2016)Doi:10.1016/j.ejmech.2012.11.017
(2013)Doi:10.1039/c2ob26877a
(2013)Doi:10.1021/co400003d
(2013)Doi:10.1016/j.bmcl.2013.01.094
(2013)Doi:10.1007/s10562-013-0984-8
(2013)