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|Type:||Artigo de periódico|
|Title:||Stereoselective synthesis of the conformationally constrained glutamate analogue, (-)-(2R,3S)-cis-2-carboxyazetidine-3-acetic acid, from (S)-N-tosyl-2-phenylglycine|
|Abstract:||The stereoselective synthesis of a novel cis conformationally constrained glutamate analogue containing an azetidine framework was accomplished from (S)-N-tosyl-2-phenylglycine in moderate overall yield. The key steps in the synthesis involved a N-H carbenoid insertion promoted by Cu(acaC)(2), a very efficient Wittig olefination of an azetidin-3-one, followed by a highly stereoselective rhodium-catalyzed hydrogenation. Epimerization of the cis to the trans analogue was performed using DBU as base in toluene at reflux.|
conformationally constrained amino acids
|Editor:||Georg Thieme Verlag Kg|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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