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Elsevier, Tetrahedron Letters, 5(43), p. 779-782

DOI: 10.1016/s0040-4039(01)02271-7

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Straightforward entry to the pipecolic acid nucleus. Enantioselective synthesis of baikiain

Journal article published in 2002 by Xavier Ginesta, Miquel A. Pericàs ORCID, Antoni Riera ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

New enantioselective syntheses of N-protected baikiain and pipecolic acid have been developed. The starting material is 2,3-epoxy-5-hexen-1-ol (4) readily available in high ee by Sharpless epoxidation. The regio- and stereoselective epoxide ring-opening by allylamine afforded a doubly unsaturated amine that was converted into a carbamate (Boc) and submitted to ring-closing metathesis. The resulting cyclic amino diol 6 is a key intermediate that was converted into N-Boc-baikiain and several pipecolic acid derivatives.