ISSN:
0899-0042
Keywords:
optical resolution
;
successive preferential crystallization
;
phenylsuccinic acid
;
organic ammonium hydrogen phenylsuccinates
;
racemic structure
;
free enrgey of racemate formation
;
binary melting point diagram
;
ternary solubility diagram
;
free energy of critical nucleation
;
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Gibbs energy of racemate formation, binary melting point diagram, and ternary solubility diagram suggested that 4-piperidinium hydrogen (RS)-phenylsuccinate [(RS)-4-MP salt] exists in a conglomerate. Appropriate conditions were explored on the basis of free energy of critical nucleation in a supersaturated solution to resolve efficiently (RS)-4-MP salt by preferential crystallization. Successive preferential crystallization of (RS)-4-MP salt in ethanol at 20°C gave (R)- and (S)-4-MP salts of 90-94% optical purities. Optically pure (R)- and (S)-phenylsuccinic acids were obtained by recrystallization of the (R)- and (S)-4-MP salts, followed by treatment of the salts purified with hydrochloric acid. © 1994 Wiley-Liss, Inc.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/chir.530060307
