4.8 Article

Enantioselective, Ketoreductase-Based Entry into Pharmaceutical Building Blocks: Ethanol as Tunable Nicotinamide Reductant

Journal

ORGANIC LETTERS
Volume 11, Issue 2, Pages 305-308

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ol802464g

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Funding

  1. NSF [CHE-0616840]
  2. Nebraska Center for Energy Sciences Research and Nebraska UCARE
  3. Direct For Mathematical & Physical Scien
  4. Division Of Chemistry [0911732] Funding Source: National Science Foundation

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The use of NADH- and NADPH-dependent ketoreductases to access enantioenriched pharmaceutical building blocks is reported. Seven structurally diverse synthons are obtained, including those for atomoxetine (KRED 132), talampanel (RS1-ADH and CPADH), Dolastatin (KRED 132), and fluoxetine (KRED 108/132). Ethanol may be used as stoichiometric reductant, regenerating both nicotinamide cofactors, particularly under four-electron redox conditions. Its favorable thermodynamic and economic profile, coupled with its advantageous dual cosolvent role, suggests a new application for biomass-derived ethanol.

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