SCHEDULED MAINTENANCE
Reaction of 3-methylpentane-2,4-dione 11 with N-acetoxyaminoquinazolinone 6 gives an isolable enol 12, which is chiral by virtue of the high barrier to rotation around its N–N bond; protonation of the double bond occurs in glacial acetic acid to give a single diastereoisomer of keto-amide 13.
R. S. Atkinson, P. J. Edwards and G. A. Thomson, J. Chem. Soc., Chem. Commun., 1992, 1256 DOI: 10.1039/C39920001256
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