The resolution of metoprolol enantiomer was achieved by TLC,using the D-10-naphthalene sulfonic acid ammonium as chiral ion-pair additives,the optimal chromatogration condition: D-10-naphthalene sulfonic acid ammonium(0.

This article briefly introduced the development of chiral dopants and analyzed the requirement of chiral dopants for various modes.

Resolution of Propranolol enantiomers by HPLC with chiral ion pair agent;

Dichloromethane isopropanol acetic acid was used as mobile phase〔 V (dichloromethane)∶ V (isopropanol)∶ V (acetic acid)=98∶1∶1〕,containing N benzyloxycarbonyl S phenyl L cysteine (BPC) as chiral ion pair agent〔 c (BPC)=3.

Catalyzed by BINOLZn complex,reductive products of 53%ee were obtained,when Et3N and TMEDA were used as achiral additives.

The paper introduced the reaction mechanism of the cationic additives in the coating color for ink-jet printing paper, their development status at home and abroad and application prospects.

In this study, three kinds of poly dimethyl diallyl ammonium chloride (Poly-DMDAAC) synthesized in laboratory are applied as cationic additives in ink-jet printing paper coatings and the objectives are to evaluate the effects of cationic additives in coating formulations on high sheared apparent visco.

The synthetic product poly-DMDAAC was subsequently prepared based on free radical solutions polymerization, which was then applied as cationic additives in ink-jet paper coating.