β-Branched α-Halo Carboxylic Acid Derivatives via Stereoselective 1,4 Addition of Dialkylaluminum Chlorides to α,β-Unsaturated N -Acyloxazolidinones
✍ Scribed by Rück-Braun, Karola; Stamm, Armin; Engel, Stefan; Kunz, Horst
- Book ID
- 126325748
- Publisher
- American Chemical Society
- Year
- 1997
- Tongue
- English
- Weight
- 354 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0022-3263
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📜 SIMILAR VOLUMES
and treated with lBuCl (1.18 g, 12.8 mmol) directly after filtration. The mixture was stirred at room temperature for 12 h before the orange solution was evaporated to dryness. Recrystallization of the residue from toluene (ca. 30 mL) affords a yellow crystalline powder (2.50 g, 40%). which decompos
## Abstract The configuration of twenty‐four different α,β‐diaryl‐α,β‐dialkylpropionitriles has been determined using nuclear magnetic resonance spectra. The __erythro__ form showed greater deshielding of the methine hydrogen and alkyl groups in its spectra than the corresponding __threo__ isomer.
Absfruct The 1.4~addition reaction of allyltrimethylsilane to a$-unsaturated N-acyloxa.zolidinones or N-enoyl-soltams ia the presence of Lcwfs acid proceeds in good chemical yield with high d&tereometic excess. The absolute configuration of the new asymmtic center is controlled by the nature of the