[EN] A PURIFICATION METHOD OF IONIC LIQUIDS TO OBTAIN THEIR HIGH PURITY [FR] PROCEDE DE PURIFICATION DE LIQUIDES IONIQUES PERMETTANT D'OBTENIR UNE GRANDE PURETE
Removal of alkyl alkanesulfonate esters from alkanesulfonic acids and other organic media
申请人:Smith Gary
公开号:US20060030725A1
公开(公告)日:2006-02-09
Methods of removing alkyl alkanesulfonate esters from aqueous or anhydrous compositions are provided. The invention provides methods for the conversion of alkyl alkanesulfonate esters of the formula RSO
3
R′ to the corresponding acids of the formula RSO
3
H. The alkyl alkanesulfonate esters are present in an organic medium, which may contain significant amounts of water or which may be anhydrous or substantially anhydrous. In some embodiments, the invention provides methods for purifying aqueous or anhydrous alkanesulfonic acids by removing alkyl alkanesulfonate esters.
Simple preparation of new [<sup>18</sup>F]F-labeled synthetic amino acid derivatives with two click reactions in one-pot and SPE purification
作者:Cheol-Min Yook、Sang Ju Lee、Seung Jun Oh、Hyun-Joon Ha、Jong Jin Lee
DOI:10.1002/jlcr.3297
日期:2015.6.30
New [(18) F]fluorinated 1,2,3-triazolyl aminoacidderivatives were efficiently prepared from Huisgen 1,3-dipolar cycloaddition reactions, well known as clickreaction. We developed two simultaneous clickreactions in one-pot with a simple solid-phase extraction (SPE) purification method. [(18) F]fluoro-1-propyne was obtained at a 45% non-decay corrected radiochemical yield based on the [(18) F]fluoride
Phase-transfer reactions catalyzed by lipophilic [2.2.2]cryptands and dicyclohexano-18-crown-6: dehydrating effect of concentrated aqueous alkaline solutions
Influence de la concentration de KOH aqueuse sur l'hydratation et donc la reactivite des anions (Cl − , Br − , I − , SCN − et N 3 − ) dans les substitutions nucleophiles aliphatiques catalysees par le cryptand [2•2•2] ou le dicyclohexyl-18-crown-6
对 KOH 水合水化等反应性阴离子 (Cl - , Br - , I - , SCN - 等 N 3 - ) 和取代物的影响对 KOH 水溶液浓度的影响 亲核 脂肪族 catalysees par le cryptand [2•2•2] ou le dicyclohexyl-18-crown-6
Reaction mechanism and factors influencing phase-transfer catalytic activity of crown ethers bonded to a polystyrene matrix
作者:Pier Lucio Anelli、Bronislaw Czech、Fernando Montanari、Silvio Quici
DOI:10.1021/ja00316a006
日期:1984.2
Takeuchi, Hirofumi; Miwa, Yoshihisa; Morita, Shushi, Chemical and pharmaceutical bulletin, 1984, vol. <3> 32, p. 823 - 831