Efficient synthesis of novel 2-spiropiperidines including an unprecedented non-symmetrical 2,6-bis-spiropiperidine
作者:Thomas M. McQueen、Samuel D. Griggs
DOI:10.1016/j.tetlet.2020.152752
日期:2021.2
Tertiary-alkyl substituted δ-amino-β-ketoesters can be readily prepared from β-amino acids, which can then undergo condensation with aldehydes to furnish novel, highly substituted 2-spiropiperidines. The method allows access to conformationally distinct structural- and regio-isomers of previously reported 2-spiropiperidines, and further expands the potential to explore three-dimensional chemical space
Systematic SAR optimization of the GPR119 agonist lead 1, derived from an internal HTS campaign, led to compound 29. Compound 29 displays significantly improved in vitro activity and oral exposure, leading to GLP1 elevation in acutely dosed mice and reduced glucose excursion in an OGTT study in rats at doses >= 10 mg/kg. (C) 2014 Elsevier Ltd. All rights reserved.