Saccharin Aza Bioisosteres-Synthesis and Preclinical Property Comparisons
Yantao Chen1, Carl-Johan Aurell2, Anna Pettersen3
1Medicinal Chemistry, Cardiovascular and Metabolic Diseases, Innovative Medicines and Early Development, AstraZeneca R&D Gothenburg, 431 83 Mölndal, Sweden.
Abstract:
Saccharin is a well-known scaffold in drug discovery. Herein, we report the synthesis and preclinical property comparisons of three bioisosteres of saccharin: aza-pseudosaccharins (cluster B), and two new types of aza-saccharins (clusters C and D). We demonstrate a convenient protocol to selectively synthesize products in cluster C or D when primary amines are used. Preclinical characterization of selected matched-pair products is reported. Through comparison of two diastereomers, we highlight how stereochemistry affects the preclinical properties. Given that saccharin-based derivatives are widely used in many chemistry fields, we foresee that structures exemplified by clusters C and D offer new opportunities for novel drug design, creating a chiral center on the sulfur atom and the option of substitution at two different nitrogens.
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