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Chiral phase-transfer catalysts (PTCs) enable asymmetric synthesis, but their application lags. This review covers advances, challenges, and sustainable methods like photocatalysis and flow chemistry for broader adoption.

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Area of Science:

  • Organic Chemistry
  • Catalysis
  • Asymmetric Synthesis

Background:

  • Chiral phase-transfer catalysts (PTCs) have been pivotal in asymmetric reactions for three decades.
  • Numerous chiral PTCs are available for producing enantioenriched compounds.
  • Newer approaches include anionic and hydrogen-bonding phase-transfer catalysis.

Purpose of the Study:

  • To review significant advancements in chiral PTCs.
  • To discuss current challenges and limitations in their application.
  • To explore sustainable chiral PTCs for future synthesis.

Main Methods:

  • Review of literature on chiral phase-transfer catalysis.
  • Analysis of established and emerging chiral PTC types.
  • Discussion of sustainable synthesis techniques (photocatalysis, flow, electrochemistry).

Main Results:

  • Chiral PTCs offer dependable routes to enantioenriched products.
  • Despite advances, widespread application in academia and industry remains limited.
  • Emerging methods offer potential for more sustainable chiral catalysis.

Conclusions:

  • Chiral PTCs are powerful tools for asymmetric synthesis.
  • Overcoming current limitations is crucial for broader implementation.
  • Sustainable approaches like photocatalysis, flow, and electrochemistry hold promise for the future of chiral PTCs.