𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Enolate ion conformations. Stereochemistry of O-alkylation of ethyl acetoacetate alkali enolates

✍ Scribed by A.L. Kurts; A. Macias; I.P. Beletskaya; O.A. Reutov


Book ID
104248012
Publisher
Elsevier Science
Year
1971
Tongue
French
Weight
197 KB
Volume
12
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis


The planar enolate ions of acyclic J3 -dicarbonyl compounds can exist in any one or all of three conformations known ae the "U" -shaped, the sickle-("s'L) shaped and the "W" -shaped


📜 SIMILAR VOLUMES


Metal ion effects on the rate of intramo
✍ Roberta Cacciapaglia; Luigi Mandolini 📂 Article 📅 1990 🏛 Elsevier Science 🌐 French ⚖ 683 KB

retarding effect of alkali metal and alkaline-earth metal ions on the rate of intramolecular 0-alkylation of the title compound has been thoroughly investigated in 99% aqueous Me2SO at 25-C. Rate data have been dissected into contributions of free ions (ki) and ion pairs (k. ). Xl Comparison of the

The ratio of C- and O-isomers in the eth
✍ A.L. Kurz; I.P. Beletskaya; A. Macías; O.A. Reutov 📂 Article 📅 1968 🏛 Elsevier Science 🌐 French ⚖ 195 KB

A series of publications has appeared recently which point out the formation of significant quantities of O-isomer in the alkylation of the alkali enolates of p -ketoesters and @-diketones /l-4/. However, in the above referred works /2, 3/, the reactions were carried out with the use of carbonates

1,2:5,6-Di-O-isopropylidene-α-D-gulofura
✍ Mulzer, Johann ;Hiersemann, Martin ;Buschmann, Jürgen ;Luger, Peter 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 551 KB

## Abstract The __C__ methylation of the carbohydrate‐derived __O__‐chiral esters 5a‐d to derivatives 8 proceeds with (__R__) selection of 1:1 to 10:1 and depends primarily on the base used for enolate generation. Lithium 2,2,6,6‐tetramethylpiperide (LTMP) shows the highest and lithium hexamethyldi