Facile enantiodivergence of meso-1,3-diacyl-2-imidazolidinones to chiral 2-imidazolidinone auxiliaries
β Scribed by Kazuhiro Yokoyama; Tadao Ishizuka; Naoko Ohmachi; Takehisa Kunieda
- Book ID
- 104259443
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- French
- Weight
- 197 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
The enantioselective monodeacylation of meso-1,3-diacetyl-2-imidazolidinones, by treatmenmt with the lithium salts of sterically constrained N,N -dimethylaminoalcohol gives 1-acetyl-2-imidazolidinones in 89% ee. Thc lattcr compounds serve as good precursors lor efficient chiral auxiliaries.
π SIMILAR VOLUMES
Addition of alkyl halides to sodium and potassium enolates of 1,3-diacyl-trans-4,5-
A novel C~-symmetric bis-sulfoxide 1 was synthesized as a chiral auxiliary for asymmetric desymmetrization of meso-1,2-diols. cis-Cyclohexane-1,2-dioi and cis-cyclopentane-1,2-diol were desymmetrized via acetalization with I followed by basepromoted acetal cleavage with high diastereoselectivity (>9
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