Enantioselective borohydride reduction of ketones catalyzed by optically active cobalt(II) complexes: Achievement of high enantioselection by modified borohydrides with furfuryl alcohol derivatives

Chemistry Letters

Volumn , Issue 9, 1996, Pages 737-738

  Sugi, Kiyoaki D ^a   Nagata, Takushi ^a   Yamada, Tohru ^a   Mukaiyama, Teruaki ^b  

^a MITSUI CHEMICALS INC   (Japan)

^b TOKYO UNIVERSITY OF SCIENCE   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0030355816     PISSN: 03667022     EISSN: None     Source Type: Journal    
DOI: 10.1246/cl.1996.737     Document Type: Article

References (18)

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15. 4-THFA-EtOH mixture in the system gave 5 in 95% ee, and it might also suggest the presence of non-catalytic path in less than 5%.
16. 3 each were successively added, and the mixture was continued to stirred for 12 h at -20 °C. The mixture was quenched by the addition of saturated aqueous ammonium chloride, and extracted with diethyl ether. The combined organic layers were washed with brine, dried over anhydrous sodium sulfate, and then the excess solvents were removed under reduced pressure. The purification by column chromatography on silica gel (hexane/ethyl acetate) gave 74.3 mg of the corresponding alcohol; 99% yield. The ee was determined by using Daicel Chiralcel OB (hexane/2-propanol).
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