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Synthesis 1993; 1993(9): 895-898
DOI: 10.1055/s-1993-25965
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Convenient Synthesis of 1,1′-Binaphthyl-2,2′-dicarboxylic Acid

Shuichi Oi* , Ken'ichi Matsunaga, Tetsutaro Hattori, Sotaro Miyano
  • *Department of Biochemistry and Engineering, Faculty of Engineering, Tohoku University, Aramaki-Aoba, Aoba-ku, Sendai 980, Japan
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Publikationsdatum:
29. April 2002 (online)

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Two syntheses of 1,1′-binaphthyl-2,2′-dicarboxylic acid (4) in good yields are presented via the oxidation of the 2′-methyl substituent of isopropyl 2′-methyl-1,1′-binaphthyl-2-carboxylate (8), which is readily obtainable by the reaction of 2-methyl-1-naphthyl Grignard reagent 7 with isopropyl 1-isopropoxy-2-naphthoate (6).