1027505-25-4Relevant academic research and scientific papers
Electronically mediated selectivity in ring opening of 1-azirines. The 3-X mode: Convenient route to 3-oxazolines
Sa, Marcus C. M.,Kascheres, Albert
, p. 3749 - 3752 (1996)
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.
