Synthesis
DOI: 10.1055/a-2661-3593
Paper

Stereocontrolled Synthesis of 2S,3R-(3)-Piperidinyl Glycine and 2S,4S-(3)-Piperidinyl Alanine: Medicinally Relevant Constrained Cyclic Amino Acids

Sofiane Hocine
1   Department of Chemistry, Université de Montréal, Station Centre-Ville, C.P. 6128, Montreal, QC H3C 3J7, Canada
,
Paul Skrzypczak
1   Department of Chemistry, Université de Montréal, Station Centre-Ville, C.P. 6128, Montreal, QC H3C 3J7, Canada
,
Victor Cosson
1   Department of Chemistry, Université de Montréal, Station Centre-Ville, C.P. 6128, Montreal, QC H3C 3J7, Canada
,
Nazim Boudjerada
1   Department of Chemistry, Université de Montréal, Station Centre-Ville, C.P. 6128, Montreal, QC H3C 3J7, Canada
,
Stephen Hanessian
1   Department of Chemistry, Université de Montréal, Station Centre-Ville, C.P. 6128, Montreal, QC H3C 3J7, Canada
2   Department of Pharmaceutical Sciences, University of California, Irvine, California 92697, United States
› Author Affiliations


Preview

Dedication

Dedicated to Professor A. R. Chamberlin for his seminal contributions to synthetic organic and medicinal chemistry.

Abstract

The stereocontrolled syntheses of 2S,3R-(3)-piperidinyl glycine hydrochloride and 2S,4S-(3)-piperidinyl alanine hydrochloride are described. These conformationally constrained α,γ- and α,δ-diamino acids were obtained via the stereoselective allylation of N–Cbz aspartate and glutamate diesters, respectively, followed by the intramolecular cyclization to form the piperidine ring. Orthogonally protected intermediates enabled late-stage diversification. Final deprotections afforded the target amino acids in high yields. The combination of the natural α-amino acid fragment and the basic piperidine unit in 3-piperidinyl glycine and alanine reveals the embedded frameworks of l-ornithine and l-lysine, making them peripheral or inserted components within structures of bioactive compounds of value for drug optimization and development.

Supplementary Material



Publication History

Received: 02 June 2025

Accepted after revision: 15 July 2025

Article published online:
13 August 2025

© 2025. Thieme. All rights reserved.

Georg Thieme Verlag KG
Oswald-Hesse-Straße 50, 70469 Stuttgart, Germany