The synthesis of 6-methylperihydropyrimidin-4-ones (1′S,6R)-3a and (1′S,6S)-3b is reported starting from rac-3-aminobutanoic acid. The aldolcondensation of various metal enolates of 3a and 3b with benzaldehyde and acetaldehyde is reported. All reactions afford complete facial diastereoselectivity and good simple diastereoselectivity, depending on the nature of the enolate and of the aldehyde. The reaction yields are generally good and the aldols have been characterized by means of 1H NMR spectroscopy and NOEDIFF experiments.
Metal-Assisted Aldol Condensation of Chiral 6-Methyl Perhydropyrimidin-4-ones
MOBBILI, Giovanna;
1993-01-01
Abstract
The synthesis of 6-methylperihydropyrimidin-4-ones (1′S,6R)-3a and (1′S,6S)-3b is reported starting from rac-3-aminobutanoic acid. The aldolcondensation of various metal enolates of 3a and 3b with benzaldehyde and acetaldehyde is reported. All reactions afford complete facial diastereoselectivity and good simple diastereoselectivity, depending on the nature of the enolate and of the aldehyde. The reaction yields are generally good and the aldols have been characterized by means of 1H NMR spectroscopy and NOEDIFF experiments.File in questo prodotto:
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