AbstractPhytosphingosine and dihydrosphingosine were isolated as a mixture of their N‐acetyl derivatives from the cells of the yeastHansenula ciferrii. After alkaline hydrolysis of the N‐acetyl compounds, the free base mixture was reacted with either acetone orp‐nitrobenzaldehyde. The reaction products consisting of the carbonyl derivative of phytosphingosine and free dihydrosphingosine were separated on an acetyl cellulose column. The acetone orp‐nitrobenzaldehyde derivative of phytosphingosine recovered from the benzene eluate contained no dihydrosphingosine as determined by thin layer and gas liquid chromatography. The operating time from preparation of the derivative through column purification was less than 3 hrs. Mass spectrometry of the acetone andp‐nitrobenzaldehyde derivatives disclosed in each case that ring closure with the carbonyl reagent involved the amino and primary hydroxyl groups to giveD‐ribo‐2‐dimethyl‐4‐(2,3‐dihydroxyhexadecyl) oxazolidine andD‐ribo‐2‐p‐nitrophenyl‐4‐(2,3‐dihydroxyhexadecyl) oxazolidene, respectively.
摘要 从纤毛酵母(Hansenula ciferrii)细胞中分离出了
植物鞘氨醇和二氢
鞘氨醇,它们是其 N-乙酰基衍
生物的混合物。在对 N-乙酰基化合物进行碱性
水解后,游离基混合物与
丙酮或
对硝基苯甲醛发生反应。反应产物包括
植物鞘氨醇的羰基衍
生物和游离的二氢
鞘氨醇,在乙酰
纤维素柱上进行分离。经薄层色谱法和气相
液相色谱法测定,从苯洗脱液中回收的
植物鞘氨醇丙酮或
对硝基苯甲醛衍
生物不含二氢鞘
磷脂。从制备衍
生物到柱纯化的操作时间不到 3 小时。
丙酮和
对硝基苯甲醛衍
生物的质谱分析表明,在每种情况下,与羰基试剂的环闭合涉及
氨基和伯羟基,分别得到D-核-2-二甲基-4-(2,3-二羟基
十六烷基)
恶唑烷和D-核-2-对
硝基苯基-4-(2,3-二羟基
十六烷基)
恶唑烯。