Several alkenyl oxaziridines were prepared either by photoisomerisation of the precursor
nitrones, or by peracid oxidation of the analogous pyrrolines. In each case the oxaziridines
were produced as separable mixtures of diastereoisomers, and reasons for the observed
stereoselectivity are discussed. Reaction of the oxaziridines with iron(II) sulfate,
tributyltin hydride, or copper(I)triphenylphosphine chloride tetramer gave products
arising from deoxygenation in many cases; however the trans-isomers also gave products derived from cyclisation of the intermediate aminyl radicals
onto the pendant alkenyl chains.
oxaziridines - radical reactions - nitrones - stereoselectivity - aminyl radicals