Synlett 2015; 26(14): 1981-1984
DOI: 10.1055/s-0034-1380427
letter
© Georg Thieme Verlag Stuttgart · New York

Continuous-Flow Kinetic Resolution of (±)-cis-1-Amino-2-indanol by Lipase-Catalyzed N-Acetylation

Yoon-Jung Kim
College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 406-840, Republic of Korea   Email: organicjeong@yonsei.ac.kr
,
Yong-Sung Choi
College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 406-840, Republic of Korea   Email: organicjeong@yonsei.ac.kr
,
Sai Yang
College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 406-840, Republic of Korea   Email: organicjeong@yonsei.ac.kr
,
Woo Ram Yang
College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 406-840, Republic of Korea   Email: organicjeong@yonsei.ac.kr
,
Jin-Hyun Jeong*
College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 406-840, Republic of Korea   Email: organicjeong@yonsei.ac.kr
› Author Affiliations
Further Information

Publication History

Received: 21 April 2015

Accepted after revision: 15 May 2015

Publication Date:
29 July 2015 (online)


Abstract

Selective N-acetylation of (1S,2R)-1-amino-2-indanol by immobilized lipase B from Candida antarctica showed high enantiomeric excess when ethyl acetate was used as the acyl donor in a THF solution. Combining this process with continuous-flow system, we could obtain enantiomerically pure N-acetyl-aminoindanol at a flow rate of 0.1 mL/min (residence time of 64 min). It has been demonstrated to be more efficient compared to the flask mode.

Supporting Information

 
  • References and Notes

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  • 14 Flask Reaction – General Procedure To a separate small vials containing 0.2 M solutions of (±)-cis-1-amino-2-indanol (298 mg, 2.0 mmol) in THF–EtOAc (0.5 mL, 50 equiv), Novozyme 435® (20 mg) was added to each vial in one portion, and the turbid solutions were shaken (125 rpm) at 30 °C. After 6 h, 12 h, 24 h, and 48 h, the enzyme was filtered off from the samples. For HPLC analysis, samples were diluted with EtOH (0.5 mL).
  • 15 (1S,2R)-1-Acetamido-2-indanol (2) White solid; [α]D 20 +11.7 (c 0.25, CHCl3). IR (neat): 3444, 3299, 1539 cm–1. 1H NMR (400 MHz, CDCl3): δ = 7.22 (s, 4 H), 6.23 (d, J = 7.2 Hz, NH), 5.32 (dd, J = 8.2, 5.1 Hz, 1 H), 4.57 (td, J = 5.1, 2.3 Hz, 1 H), 3.13 (dd, J =16.5, 5.3 Hz, 1 H), 291 (dd, J = 16.5, 2.1 Hz, 1 H), 2.57 (br s, 1 H), 2.07 (s, 3 H). 13C NMR (100 MHz, CDCl3): δ = 170.9, 140.6, 139.9, 128.2, 127.2, 125.3, 124.5, 73.5, 57.6, 39.6, 23.3. ESI-HRMS: m/z calcd for C11H14NO2 +: 192.1019; found: 192.1016 [M + H]+.
  • 16 Continuous-Flow Reaction, General Procedure Novozyme 435® (2.0 g) was packed into a glass column with an aluminum heating jacket for maintaining temperature at 30 °C. The column was fully washed with THF and then fed with a solution of (±)-cis-1-amino-2-indanol (0.1 M) in EtOAc and THF (1:1). At various flow rates (2.0, 1.0, 0.5, 0.25, and 0.1 mL/min), 1 mL of samples were collected. For HPLC analysis, samples were diluted with EtOH (0.5 mL).