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Alkylation of Ethyl, Isobornyl, and Menthyl Esters of 2-Methylbutanoic Acid

✍ Scribed by Pincock, Richard E.; Rolston, John H.

Book ID
127163147
Publisher
American Chemical Society
Year
1964
Tongue
English
Weight
458 KB
Volume
29
Category
Article
ISSN
0022-3263

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Synthesis of the 2-ethyl-3-methylsuccini
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## Abstract Reaction of (βˆ’)‐(__S__)‐methyl 2‐bromopropionate (**4**) (obtained from l‐alanine) with dibenzyl ethylmalonate gave stereospecifically in four steps ( + )‐(2__R__,3__S__)‐2‐ethyl‐3‐methylsuccinic acid (**8a**) and its diastereoisomer (**8b**). The malonic ester alkylation proceeded with