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Novel catalytic action of clay montmorillonite on the addition reactions of silyl ketene acetals to α,β-acetylenic esters

✍ Scribed by Makoto Onaka; Taku Mimura; Ryosuke Ohno; Yusuke Izumi

Book ID
104244971
Publisher
Elsevier Science
Year
1989
Tongue
French
Weight
161 KB
Volume
30
Category
Article
ISSN
0040-4039

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✦ Synopsis

Clay montmorillonite shows novel catalytic behavior to the addition of silyl ketene acetals to ynoates as a heterogeneous solid acid, and this activity has been compared with that obtained with trimethylsilyl triflate.

📜 SIMILAR VOLUMES

The catalytic asymmetric aldol reaction
The catalytic asymmetric aldol reaction of aldehydes with unsubstituted and monosubstituted silyl ketene acetals: formation of anti-β-hydroxy-α-methyl esters
✍ Emma R. Parmee; Yaping Hong; Orin Tempkin; Satoru Masamune 📂 Article 📅 1992 🏛 Elsevier Science 🌐 French ⚖ 272 KB

The title reaction with unsubstifufed and monosubstituted silyf ketene acetals proceeds with high enantioseiectivify, and in the latter case good dinstereoselecfivity favoring the anfi-/Chydrory-amethyl esters in all reported cases.