An efficient asymmetric synthesis of azetidine 2-phosphonic acids
Autor: | François Couty, Nicolas Rabasso, Claude Agami |
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Rok vydání: | 2002 |
Předmět: | |
Zdroj: | Tetrahedron Letters. 43:4633-4636 |
ISSN: | 0040-4039 |
Popis: | Substituted azetidinic 2-phosphonates were prepared in diastereoisomerically and enantiomerically pure form, starting from readily available β-amino alcohols. This synthesis involved a three-step sequence: (i) N-alkylation of the starting amino alcohol with a methylene phosphonate moiety, (ii) chlorination of the alcohol, and (iii) stereoselective 4-exo-tet ring closure through an intramolecular alkylation of the lithiated aminophosphonate. |
Databáze: | OpenAIRE |
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