Bromofluorination of bis(allyl)polyoxyethylene glycol ethers
摘要:
The bromofluorination of bis(allyl)polyoxyethylene glycol ethers has been achieved by action of N-bromosuccinimide/triethylamine trishydrogenfluoride. For the starting 2-methylallyl ethers, the addition reaction is regioselective and only tertiary fluorine adducts were observed. Under the same conditions a mixture of addition and degradation products was observed from the nonbranched bis(allyl) ethers. (C) 2000 Elsevier Science S.A. All rights reserved.
Synthesis of bis(bromomethyl) dimethyl crown ethers and complexation properties of their derivatives having electron-donating sidearms
作者:Yohji Nakatsuji、Tsuneharu Mori、Mitsuo Okahara
DOI:10.1016/s0040-4039(01)81190-4
日期:1984.1
Several bis(bromomethyl) dimethyl 15-crown-5, 18-crown-6, and 21-crown-7 were prepared according to two methods without protecting reactive bromo substituents. Cis and trans isomers of la are separated and the structures are inferred by considering the complexation property of their derivatives having electron-donating sidearms toward sodium and potassium cations.