MISC

2018年7月6日

Dynamic Kinetic Resolution of N-Protected Amino Acid Esters via Phase-Transfer Catalytic Base Hydrolysis

ACS Catalysis

8
7
開始ページ
5708
終了ページ
5713
DOI
10.1021/acscatal.8b00693

Copyright © 2018 American Chemical Society. Asymmetric base hydrolysis of α-chiral esters with synthetic small-molecule catalysts is described. Quaternary ammonium salts derived from quinine were used as chiral phase-transfer catalysts to promote the base hydrolysis of N-protected amino acid hexafluoroisopropyl esters in a CHCl3/NaOH (aq) via dynamic kinetic resolution, providing the corresponding products in moderate to good yields (up to 99%) with up to 96:4 er. Experimental and computational mechanistic studies using DFT calculation and pseudotransition state (pseudo-TS) conformational search afforded a TS model accounting for the origin of the stereoselectivity. The model suggested π-stacking and H-bonding interactions play essential roles in stabilizing the TS structures.

リンク情報
DOI
https://doi.org/10.1021/acscatal.8b00693
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85047455460&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85047455460&origin=inward
ID情報
  • DOI : 10.1021/acscatal.8b00693
  • eISSN : 2155-5435
  • SCOPUS ID : 85047455460

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