R. Montalvo-Gonza´lez and A. Ariza-Castolo
matrix and a 6265 × 751 Hz frequency matrix; pulse time intervals
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2 s. Fourier transformations were carried out using a square-sine
function for F1 and F2, in absolute value mode.
Mass spectra were determined using a Hewlett-Packard 5890
spectrometer at 70 eV coupled with a gas chromatograph in
electron ionization (EI) mode.
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and dried over MgSO4. Oxaziridines were purified by using a
flash chromatography alumina (1a–1g) or a silica gel (2a–2g)
column and 90% hexane/10% ethyl acetate as an eluting agent. To
synthesize the lactams, oxaziridines were left at room temperature
and atmosphere during 4 weeks.
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Mass spectra data, Karplus-type plots and an example of
assignment are collected in the Supporting information.
Acknowledgements
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The author would like to thank CONACYT for a research grant (No.
56604).
Supporting information
Supporting information may be found in the online version of this
article.
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