4-Fluoroisoleucine was produced by ammonolysis of 2- bromo-4-fluoro-3-methylpentanoic acid, which resulted from the bromofluorination of 4-methyl-2-pentenoic acid. It did not inhibit Plasmodium berghei in mice at 640 mg/kg and was not toxic to the animals. The fluoroamino acid inhibited Aspergillus niger, Trichoderma viride, Myrothecium verrucaria, Trichophyton mentagrophytes, and Mucor mucedo in Czapek solution agar at a concentration between 104 and 103 μg/ml. Growth of Escherichia coli was inhibited 25% at 900 μg/ml in a defined medium
Gershon, Herman; Shanks, Larry; and Clarke, Donald Dudley PhD, "Amino acid analogs IV: 4-fluoroisoleucine / Herman Gershon, Larry Shanks, and Donald D. Clark" (1978). Chemistry Faculty Publications. 68.