Synthesis of Dihydroxyethylene Isosteres of Dipeptides. 1. Enantiomerically and Diastereomerically Pure 2-Alkyl-5-amino-3-dimethylphenylsilyl-4-octanolides from (S)-N,N-Dibenzylleucinal
- 1 January 1992
- journal article
- research article
- Published by Georg Thieme Verlag KG in Synthesis
- Vol. 1992 (09) , 859-864
- https://doi.org/10.1055/s-1992-26247
Abstract
5-Dibenzylamino-3-dimethylphenylsilyl-4-octanolides are prepared via homoenolate addition of (S)-N,N-dibenzylleucinal [(S)-2-dibenzylamino-4-methylpentanal] and metalated 3-dimethylphenylsilyl-2-propenyl N,N-diisopropylcarbamate, followed by oxidative lactonization. Subsequently, alkyl groups are introduced stereoselectively to the 2-position by means of enolate methodology to yield the title compounds, which are valuable intermediates in the synthesis of dipeptide isosteres.Keywords
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