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|Type:||Artigo de periódico|
|Title:||Electronically Mediated Selectivity In Ring Opening Of 1-azirines. The 3-x Mode: Convenient Route To 3-oxazolines.|
|Author:||Sá, Marcus C. M.|
|Abstract:||The mild base-promoted reaction of methyl 2-phenyl-1-azirine-3-acetate (1) with aldehydes and acetone provides a new and simple route to the 3-oxazolines 5, which are formed in good yields by the electrophilic trapping of an imino anion produced by C-N bond cleavage in the 1-azirine enolate intermediate 6. Chloranil oxidation of 5 containing an aromatic substituent at C-2 affords oxazoles 7, while reaction of 5 containing an aliphatic group at C-2 produces 5-methylene-3-oxazolines 8 and 5-spiro-2-oxazolines 9 in addition to 7.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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