Synthesis 2017; 49(02): 353-357
DOI: 10.1055/s-0036-1588910
© Georg Thieme Verlag Stuttgart · New York

Diastereoselective Synthesis of an Industrially Relevant 4-Aminopentanoic Acid by Asymmetric Catalytic Hydrogenation in a Biphasic­ System Using Aqueous Sodium Hydroxide as Substrate Phase

Calogero G. Piscopo
a   Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany
Fabrice Gallou
b   Novartis Pharma AG, Postfach, 4002 Basel, Switzerland   Email:   Email:
Walter Leitner*
a   Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany
Giancarlo Franciò*
a   Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany
› Author Affiliations
Further Information

Publication History

Received: 17 October 2016

Accepted: 20 October 2016

Publication Date:
22 November 2016 (online)

Dedicated to Prof. Dieter Enders on the occasion of his 70th birthday, in deep respect for his groundbreaking contributions to asymmetric catalysis.


A ’basic solution' for multiphase catalysis: The diastereoselective synthesis of a pharmaceutically relevant 4-aminopentanoic acid derivative has been studied using a chiral homogeneous catalyst in tailored biphasic reaction media. Different polar solvents were investigated as the stationary phase for the well-established Ru–Mandyphos catalyst in combination with aqueous NaOH as the substrate and product phase. Facile product isolation and effective recycling of the catalyst phase were demonstrated at gram-scale. In particular, up to 3200 turnovers have been achieved in seven repetitive batches with a diastereoselectivity of 87–96% using [EMIM][NTf2]/NaOHaq as the biphasic system.

Supporting Information

  • References

  • 1 Keim W. Green Chem. 2003; 5: 105
  • 2 Multiphase Homogeneous Catalysis . Cornils B, Herrmann WA, Horváth IT, Leitner W, Mecking S, Olivier-Bourbigou H, Vogt D. Wiley-VCH; Weinheim: 2005
  • 3 Herrmann WA, Kohlpaintner CW. Angew. Chem., Int. Ed. Engl. 1993; 32: 1524
  • 4 Aqueous-Phase Organometallic Catalysis: Concepts and Applications . 2nd ed.; Cornils B, Herrmann WA. Wiley-VCH; Weinheim: 2004
  • 5 Prat D, Hayler J, Wells A. Green Chem. 2014; 16: 4546
  • 6 Joó F, Kathó Á. Two-Phase Aqueous Hydrogenations . In Handbook of Homogeneous Hydrogenation . de Vries JG, Elsevier CJ. Wiley-VCH; Weinheim: 2008: 1327
    • 7a Verspui G, Elbertse G, Sheldon FA, Hacking MA. P. J, Sheldon RA. Chem. Commun. 2000; 1363
    • 7b McCarthy M, Stemmer H, Leitner W. Green Chem. 2002; 4: 501
    • 8a Burgemeister K, Franciò G, Hugl H, Leitner W. Chem. Commun. 2005; 6026
    • 8b Burgemeister K, Franciò G, Gego VH, Greiner L, Hugl H, Leitner W. Chem. Eur. J. 2007; 13: 2798
  • 9 Pugin B, Studer M, Kuesters E, Sedelmeier G, Feng X. Adv. Synth. Catal. 2004; 346: 1481
  • 10 von Lueder TG, Atar D, Krum H. Pharmacol. Ther. 2014; 144: 41
  • 11 Hook D, Wietfeld B, Lotz M. WO 2008031567, 2008
  • 12 Please note that the olefin moiety has a higher CIP priority as compared to the aryl substituent in (R)-1-CO2H. After hydrogenation of the olefinic double bond, however, the priority sequence at C-4 reverses accordingly to the CIP rule. Thus the stereodescriptor for carbon 4 switches from (4R)-1-CO2H to (4S)-2-CO2H without the relative spatial orientation at the (preexisting) stereocenter being affected.
    • 13a Perea JJ. A, Lotz M, Knochel P. Tetrahedron: Asymmetry 1999; 10: 375
    • 13b Lotz M, Ireland T, Perea JJ. A, Knochel P. Tetrahedron: Asymmetry 1999; 10: 1839
  • 14 Spindler F, Malan C, Lotz M, Kesselgruber M, Pittelkow U, Rivas-Nass A, Briel O, Blaser HU. Tetrahedron: Asymmetry 2004; 15: 2299
  • 15 (2R,4S)-3-CO2H =
  • 16 For the isolation of pure (2R,4S)-2-CO2H from a similar mixture, a reliable purification procedure through crystallyzation is reported: see ref. 11.
  • 17 Huebner S, de Vries JG, Farina V. Adv. Synth. Catal. 2016; 358: 3