𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Phase Transfer Catalyzed Asymmetric Epoxidation of Chalcones Using Chiral Crown Ethers Derived from D-Glucose and D-Mannose.

✍ Scribed by Peter Bako; Tibor Bako; Attila Meszaros; Gyoergy Keglevich; Aron Szoellosy; Sandor Bodor; Attila Mako; Laszlo Toke

Publisher
John Wiley and Sons
Year
2004
Weight
168 KB
Volume
35
Category
Article
ISSN
0931-7597

No coin nor oath required. For personal study only.

πŸ“œ SIMILAR VOLUMES

ChemInform Abstract: Asymmetric Epoxidat
ChemInform Abstract: Asymmetric Epoxidation of Substituted Chalcones and Chalcone Analogues Catalyzed by Ξ±-D-Glucose- and Ξ±-D-Mannose-Based Crown Ethers.
✍ Attila Mako; Zsolt Rapi; Gyoergy Keglevich; Aron Szoelloesy; Laszlo Drahos; Lasz πŸ“‚ Article πŸ“… 2010 πŸ› John Wiley and Sons βš– 37 KB

## Abstract The asymmetric epoxidation of substituted chalcones and chalcone analogues catalyzed by crown ethers leads to comparable and in a few cases, better results with respect to enantioselectivities, compared to those obtained in the presence of chinchona alkaloids.

Asymmetric Michael addition of 2-nitropr
Asymmetric Michael addition of 2-nitropropane to a chalcone catalyzed by chiral crown ethers incorporating a D-glucose unit
✍ PΓ©ter BakΓ³; LΓ‘szlΓ³ TΓΆke; Áron SzΓΆllΓΆsy; Petra Bombicz πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 173 KB πŸ‘ 2 views

Michael addition of 2-nitropropane 4 to a chalcone 3 catalyzed by crown ethers incorporating two glucose units (of 1 type) afforded the adduct 5 with an R-enantiomer excess (28% ee) while the aza-crown ethers containing one glucose unit (of 2 type) gave the same adduct favoring the S-enantiomer unde