Chemo-enzymatic synthesis of enantiomerically pure (R)-2-naphthylmethoxyacetic acid

Mayumi Kimura, Atsuhito Kuboki, Takeshi Sugai

研究成果: Article査読

36 被引用数 (Scopus)

抄録

Enantiomerically pure (R)-2-naphthylmethoxyacetic acid (2-NMA) was synthesized from 2-naphthaldehyde via an integrated chemo-enzymatic procedure. The one-pot, successive use of SnBr2-TMSCN and AcBr worked effectively to give a racemic cyanohydrin acetate. Lipase from Burkholderia cepacia then mediated the highly enantioselective hydrolysis of the (S)-enantiomer of the racemate, leaving the (R)-acetate with an e.e. of >99.9%. The resulting product of this enzyme-catalyzed hydrolysis, an (S)-cyanohydrin, spontaneously decomposed into naphthaldehyde, the starting material of this synthetic route, which could be recycled. The hydration of nitrile to amide as well as the hydrolysis of the acetate was performed with a microorganism, Rhodococcus rhodochrous, under very mild conditions without any loss of the enantiomeric purity. The amide group was hydrolyzed with nitrosylsulfuric acid, and the product was isolated as an α-hydroxy ester. The α-hydroxyl group was methylated with diazomethane-silica gel and the final task, hydrolysis of the ester, was accomplished under conditions as mild as neutral pH with an esterase from Krebsiella oxytoca to give enantiomerically pure 2-NMA.

本文言語English
ページ(範囲)1059-1068
ページ数10
ジャーナルTetrahedron Asymmetry
13
10
DOI
出版ステータスPublished - 2002 6月 10

ASJC Scopus subject areas

  • 触媒
  • 物理化学および理論化学
  • 有機化学
  • 無機化学

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