~1H NMR用EM-360L型(60 MHz)仪测定。温度计未校正。1.dl-α-苯基丁酸酐的制备在天然产物立体化学的研究中,化合物中羟基的绝对构型常用Horeau方法测定。此方法中所用的dl-α-苯基丁酸酐,文献报道是以苯乙腈为原料,经三步合成的,即苯乙腈用氨基钠和溴乙烷处理得α-苯基丁腈,再水解为 ~ 1H NMR was measured on a model EM-360L (60 MHz). Thermometer uncorrected. Preparation of dl-α-phenylbutyric anhydride In the study of stereochemistry of natural products, the absolute configuration of the hydroxyl groups in the compounds is often determined by the Horeau method. Dl-α-phenylbutyric anhydride used in this method, reported in the literature is benzene acetonitrile as the raw material, synthesized in three steps, namely, benzene acetonitrile with sodium amide and ethyl bromide were treated α-phenyl butyronitrile, re-hydrolysis for