## An ambident O,O-dialkylphosphorose- lenothioate is glycosidated in the presence of boron trifluoride etherate to give both Se-and S-glycosyl-phosphoroselenothioates, the former predominating. The stereochemical course of this reaction depends on the kind of sugar substrates. By selective oxidat
The First Example of an Increase in the Enantioselectivity of a Chemical Reaction in the Presence of a Chiral Lewis Acid under High Pressure
β Scribed by Prof. Dr. Lutz F. Tietze; Dipl.-Chem. Christian Ott; Kerstin Gerke; Prof. Dr. Michael Buback
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 249 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0044-8249
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract Chiral Lewis acid catalysis has emerged as one of the premiere method to control stereochemistry. Much effort has gone into the design of superior ligands with increasing steric extension to shield distant reactive sites. We report here an alternative and complementary approach based on
The synthesis of enantiomerically enriched (+)-(R)-2-methyl-1-tetralone 1 (up to 29% e.e.) was achieved by enantioselective protonation of the achiral enolate such as 2, using the oxazoline (S)-3 as the source of chirality. Chirality 11:787-789, 1999.