The Knoevenagel reaction in water catalyzed by zwitterionic liquids
摘要:
Three hydroxyl functionalized zwitterionic liquids (ZILs) were found to be novel recyclable catalysts for the Knoevenagel condensation between aldehydes or ketones and active methylene compounds in aqueous medium. Both aldehydes and ketones gave satisfactory results. The products could simply be separated from the catalysts/water, and the catalysts could be recycled six times without noticeably decreasing the catalytic activity.
Cationic dyeable copolyester polymer and yarns made therefrom having as an integral part of the polymer chain, sulfonamide groups each containing a dye sensitizing unit, derived from alkaline earth or alkali metal salts of sulfonated sulfonamides such as the sodium salt of N-(.beta.-hydroxyethyl)-N-(3-carbomethoxybenzenesulfonyl) taurine.
Zeid,I.; Ismail,I., Justus Liebigs Annalen der Chemie, 1974, p. 667 - 670
作者:Zeid,I.、Ismail,I.
DOI:——
日期:——
[EN] METHOD FOR BUFFERING A CHEMICAL OR BIOLOGICAL COMPOSITION<br/>[FR] COMPOSÉS TAMPONS
申请人:SACHEM INC
公开号:WO2012071102A3
公开(公告)日:2012-10-11
The Knoevenagel reaction in water catalyzed by zwitterionic liquids
作者:Dong Fang、Zheng-hao Fei、Zu-liang Liu
DOI:10.1007/s00706-008-0855-y
日期:2008.7
Three hydroxyl functionalized zwitterionic liquids (ZILs) were found to be novel recyclable catalysts for the Knoevenagel condensation between aldehydes or ketones and active methylene compounds in aqueous medium. Both aldehydes and ketones gave satisfactory results. The products could simply be separated from the catalysts/water, and the catalysts could be recycled six times without noticeably decreasing the catalytic activity.
FORESTIERE A.; SILLON B., J. HETEROCYCL. CHEM., 1980, 17, NO 7, 1381-1383