DOI: 10.1002/ejoc.202301212 ISSN: 1434-193X

Asymmetric Organocatalyzed Synthesis of α‐Aminophosphinates via Thiourea Anion‐Binding Catalysis

Cáoimhe J. Niland, Joseph J. Ruddy, Martin P. O’Fearraigh, Eoghan M McGarrigle
  • Organic Chemistry
  • Physical and Theoretical Chemistry

Thioureas catalyze the reaction of phosphonites with in situ‐generated isoquinolinium salts to give C and P‐stereogenic α‐aminophosphinates in high enantioselectivity (up to 96%) and yield (up to 95%). Low diastereoselectivity was obtained and this is rationalized in the context of a mechanistic proposal involving anion‐binding catalysis of the P‐C bond formation step followed by uncatalyzed Arbuzov collapse. The scope of the reaction, including a g‐scale example, was demonstrated.

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