Preparation of 2-methylenebutanedioic acid-4-14C (itaconic acid)
✍ Scribed by D. R. Campbell
- Publisher
- John Wiley and Sons
- Year
- 1975
- Tongue
- French
- Weight
- 180 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
The pyrolysis of citric acid‐1, 5‐^14^C~2~ under controlled conditions and subsequent hydrolysis of the anhydride initially produced yields principally 2‐methylenebutanedioic acid‐4‐^14^C (citaconic acid‐^14^C), together with a minor amount of cis‐2‐methylbutenedioic acid‐4‐^14^C (citraconic acid‐^14^C). Comparison of the molar specific activities of the precursor and products indicates the absence of a carbon kinetic isotope effect in the decarboxylation‐dehydration reaction.
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## Abstract The preparation of 2‐(4‐chlorophenyl)‐[2‐^14^C]thiazol‐4‐ylacetic acid [I.C.I. 54,450] from potassium [^14^C] cyanide in six stages is described. The overall radioachemical yield of product, at a specific activity of 12.56 μCi/mg, was 22.2%.