Asymmetric Synthesis of Functionalized Phenylalanine Derivatives via Rh-Catalyzed Conjugate Addition and Enantioselective Protonation Cascade

Jia Hong Jian, Hao Wei Zeng, Ting Shen Kuo, Ping Yu Wu, Hsyueh Liang Wu

Research output: Contribution to journalArticle


The asymmetric conjugate addition of arylboronic acids to N-phthalimidodehydroalanine 1i catalyzed by Rh(I)/L1a enables the facile preparation of chiral functionalized phenylalanines. The reaction proceeds by a conjugate addition and enantioselective protonation cascade, affording a rhodium enolate that undergoes re-face protonation. The reaction tolerates various arylboronic acids and can be used in the gram-scale synthesis of (S)-phenylalanine hydrochloride, demonstrating the reaction scope and the synthetic feasibility of the process.

Original languageEnglish
Pages (from-to)9468-9472
Number of pages5
JournalOrganic Letters
Issue number23
Publication statusPublished - 2019 Dec 6
Externally publishedYes


ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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