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作 者:王丽莉[1] 徐小静[1] 陈贵阳[1] 阮源萍[1]
机构地区:[1]厦门大学化学化工学院化学系,分析化学重点实验室,福建厦门361005
出 处:《色谱》2010年第3期305-310,共6页Chinese Journal of Chromatography
基 金:国家基础科学人才培养基金项目(No.J0630429)
摘 要:采用Chirex(S)-LEU&(S)-NEA、ChiralcelOD-H和ChiralpakAD-H手性色谱柱直接拆分了2′-羟基-1,1′-联萘-2-苯甲酸酯(HBNB)、1,1′-联萘-2,2′-二苯甲酸酯(BNDB)和2′-甲氧基-1,1′-联萘-2-苯甲酸酯(MBNB)对映体。分别考察了流动相组成、柱温和化合物结构对手性分离的影响。结果表明:3对联萘二酚苯甲酸酯对映体在ChiralpakAD-H柱上的拆分效果最好。当采用正己烷/异丙醇(40/60,v/v)为流动相时,HBNB、BNDB和MBNB对映体的分离因子(α)和分离度(Rs)分别为1.76、1.74、1.40和6.47、7.81、4.75。对比联萘二酚(BN)的分离,从联萘分子中2-位取代基、对映体出峰顺序和热力学参数等方面探讨了相关手性分离机理。The enantioseparations of 2'-hydroxy-1, 1'-binaphthyl-2-yl benzoate ( HBNB), 1, 1 '- binaphthyl-2,2'-diyl dibenzoate (BNDB) and 2'-methoxy-1,1 '-binaphthyl-2-yl benzoate ( MB- NB) were studied on Chirex (S)-LEU & (S)-NEA, cellulose tris (3,5-dimethylphenylcarbamate) ( Chiralcel OD-H ) and amylose tris ( 3,5-dimethylphenylcarbamate ) ( Chiralpak AD-H ) columns, respectively, using high performance liquid chromatography. The effects of mobile phase, column temperature and compound structures on the enantioseparations were discussed. The Chiralpak AD-H exhibited stronger capability of enantioseparation in comparison with those of Chirex ( S)-LEU & ( S)-NEA and Chiralcel OD-H for 1, 1 '-bi-2-naphthol benzoates. When using the mobile phase of n-hexane/2-propanol (40/60, v/v), the chiral selectivi- ties of HBNB, BNDB and MBNB were 1.76, 1.74, and I. 40, respectively. Moreover, in comparison with that of 1,1 '-bi-2-naphthol ( BN), the mechanisms of the enantioseparation of 1,1 '- bi-2-naphthol benzoates, related to the substituted groups at 2-position, the elution orders and thermodynamic parameters were also discussed.
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