Abstract
Abstract Dl-Glutamic acid has been synthesized from 1,1,1,5-tetrachloropentane. The process involves five steps through 1,1,1-trichloro-5-hydroxypentane (92%), 5,5,5-trichlorovaleric acid (94%), 5,5-dichloro-4-pentenoic acid (85%), α-chloroglutaric acid (82%), and Dl-glutamic acid (87%). The over-all field from 1,1,1,5-tetrachloropentane to Dl-glutamic acid was 52%. In the dehydrochlorination of 5,5,5-trichlorovaleric acid to 5,5-dichloro-4-pentenoic acid, rather weak Lewis acid catalysts, such as bismuth chloride and zinc chloride were found to give the best results.
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