【摘 要】
：
Menthol reacts with phosphorus trichloride to afford menthyl phosphorodichloridite 2, which further reacts with racemic 1, 1-binaphthalene-2, 2-diol to give pho
【出 处】
：
Chinese Chemical Letters
论文部分内容阅读
Menthol reacts with phosphorus trichloride to afford menthyl phosphorodichloridite 2, which further reacts with racemic 1, 1-binaphthalene-2, 2-diol to give phosphite (+)-3 in the presence of triethylamine. (+)-3 can be easily separated by fractional crystallization to form the crystal (+)-(S)-3 and the mother liquor (-)-(R)-3. Then both the crystal and the mother liquor are treated with AcOH-H2O to obtain enantiomeric pure (-)-(S)-1 and (+)-(R)-1 respectively, with enantiomeric excess up to 99.7%.
Menthol reacts with phosphorus trichloride to afford menthyl phosphorodichloridite 2, which further reacts with racemic 1, 1-binaphthalene-2, 2-diol to give phosphite (+) - 3 in the presence of triethylamine. by fractional crystallization to form the crystal (+) - (S) -3 and the mother liquor (-) - (R) -3. Then both the crystal and the mother liquor are treated with AcOH-H2O to obtain enantiomeric pure ) - (S) -1 and (+) - (R) -1 respectively, with enantiomeric excess up to 99.7%.
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