Home
Resources
Publications
Analytical Chiral Separation of the Stereoisomers of a Novel Carbonic Anhydrase Inhibitor and Its Deethylated Metabolite, and the Assignment of Absolute Configuration of the Human Metabolite and Chiral Degradation Products

Analytical Chiral Separation of the Stereoisomers of a Novel Carbonic Anhydrase Inhibitor and Its Deethylated Metabolite, and the Assignment of Absolute Configuration of the Human Metabolite and Chiral Degradation Products

B K Matuszewski, M L Constanzer, M Kiganda

Pharm Res. 1994 Mar;11(3):449-54.

PMID: 8008715

Abstract:

Several approaches to the separation of four stereoisomers, 1-4, of a novel, topically active, carbonic anhydrase inhibitor, 1, with two chiral centers in the molecule and four isomers, 5-8, of its chiral metabolite, 5, were evaluated. These methods include nonchiral derivatization followed by separation on chiral stationary phases (CSPs) and chiral derivatization and separation on nonchiral columns and on CSPs. Baseline separation of stereoisomers 1-4 was achieved in less than 15 min after chiral derivatization with (S)-(+)-1-(1-naphthyl)ethyl isocyanate (NEIC) and chiral chromatography on a (R)-N-(3,5-dinitrobenzoyl)phenyl glycine (DNBPG) column under normal phase (NP) conditions. Similarly, isomers 5-8 were baseline separated in less than 20 min after derivatization with NEIC and chromatography on nonchiral (nitrophenyl) and chiral [(S)-(3,5-dinitrobenzoyl)leucine; DNBL] columns in series under the same NP chromatographic conditions. Only partial separation of the diastereomeric derivatives was observed on a variety of nonchiral columns. In addition, all other direct and indirect chiral separation approaches gave only partial separation of at least two stereoisomers within the group of 1-4 or 5-8. The details of chiral separations using various methods and separation (alpha) and capacity factors (k') of the derivatized isomers 1-8 on a series of chiral and nonchiral columns are presented. Using these methods, the absolute configuration of the human metabolite of 1 was established as S1S2 (5), and the heat (HD) and light (LD) degradation products of 1 as R1S2 (3) and S1S2 (5), respectively.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP42340987	(R)-(−)-1-(1-Naphthyl)ethyl isocyanate		42340-98-7	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: