On August 31, 2014, Shimakami, Natsumi; Yabutani, Tomoki; Takayanagi, Toshio published an article.Name: 4-(4-Chlorophenyl)piperidin-4-ol The title of the article was Analysis of acid dissociation of photo-degradable haloperidol through the measurement of electrophoretic mobility by capillary zone electrophoresis. And the article contained the following:
The acid dissociation constants (Ka) of Haloperidol and its degraded product were determined by capillary zone electrophoresis (CZE). Haloperidol is degraded by UV-light irradiation, and 4-(p-chlorophenyl)-4-hydroxypiperidine (CPHP) is generated from Haloperidol. When the irradiated solution was analyzed by CZE, residual Haloperidol and two degraded products were detected. The acid dissociation constant of Haloperidol was determined through the electrophoretic mobility of the residual Haloperidol, and the pKa value determined was similar to that measured under no degradation conditions, as well as literature values. It was also confirmed that one of the degraded products was assigned to CPHP based on the migration time, the electrophoretic mobility, and its acid dissociation constant analyzed. It was demonstrated in this study that the acid dissociation constants are accurately determined by using CZE, even under degraded conditions of the analyte. The experimental process involved the reaction of 4-(4-Chlorophenyl)piperidin-4-ol(cas: 39512-49-7).Name: 4-(4-Chlorophenyl)piperidin-4-ol
The Article related to haloperidol photodegradation acid dissociation constant capillary zone electrophoresis, Pharmaceutical Analysis: Synthetic Organic Compounds and other aspects.Name: 4-(4-Chlorophenyl)piperidin-4-ol
Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem