Synthesis of 1-fluoroindan-1-carboxylic acid (FICA) and its properties as a chiral derivatizing agent
作者:Tamiko Takahashi、Hiroaki Kameda、Tomoyo Kamei、Miyuki Ishizaki
DOI:10.1016/j.jfluchem.2006.02.008
日期:2006.6
1-Fluoroindan-1-carboxylic acid (FICA) (1) was designed and synthesized as its methyl ester (FICA Me ester) (4) in order to develop an efficient chiral derivatizing agent (CDA) which excels α-methoxy-α-(trifluoromethyl)phenylacetic acid (MTPA) in capability. FICA Me ester (4) was prepared by fluorination of methyl 1-hydroxyindan-1-carboxylate (3) with (diethylamino)sulfur trifluoride (DAST) and derived to the
为了开发出一种优于α-甲氧基-α-的高效手性衍生剂(CDA),设计并合成了1-氟罗丹丹-1-羧酸(FICA)(1)作为其甲酯(FICA Me酯)(4)。 (三氟甲基)苯乙酸(MTPA)的能力。通过用(二乙基氨基)三氟化硫(DAST)氟化1-羟基茚满-1-羧酸甲酯(3)来制备FICA Me酯(4),并通过酯交换反应将其衍生为外消旋仲醇的酯。将所得的Δ δ ˚F值在FICA(2-丁基酯的情况下大图5a),而在相应的MTPA酯(的情况下不可检测的图6a)。Δ的大小δ ħ值是相似的MTPA酯。分离了FICA(5i)的(R)-(-)-8-苯基薄荷基酯的非对映异构体,并通过1 H NMR分析表明,改进的Mosher方法的概念已成功应用于5i。