Synthesis of (S)-3-Amino-4-(difluoromethylenyl)-cyclopent-1-ene-1-carboxylic Acid (OV329), a Potent Inactivator of γ-Aminobutyric Acid Aminotransferase

Matthew J. Moschitto, Richard B. Silverman

Research output: Contribution to journalArticle

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(S)-3-Amino-4-(difluoromethylenyl)cyclopent-1-ene-1-carboxylic acid (OV329, 1) is being developed for the treatment of epilepsy and addiction. The previous 14-step synthesis of OV329 was low yielding, involved an unselective α-elimination to form the cyclopentene, required the use of tert-butyllithium, and produced toxic selenium byproducts in the penultimate step. A new synthesis, which avoids the aforementioned issues, was carried out on large scale, reducing the step count from 14 to 9 steps and increasing the overall yield from 3.7% to 8.1%.

Original languageEnglish (US)
Pages (from-to)4589-4592
Number of pages4
JournalOrganic letters
Issue number15
StatePublished - Aug 3 2018
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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