作者:Ronald D. Lee、Kelem Kassahun、Frank S. Abbott
DOI:10.1002/jps.2600780813
日期:1989.8
Two diene metabolites of valproic acid (VPA), (E)-2-n-propyl-2,4-pentadienoic acid and (E)-2-(1'-propenyl)-(E)-2-pentenoic acid, were stereoselectively synthesized. Mesylate elimination in the final step to produce the unsaturation at position 2 was stereospecific for the (E)-configuration in the case of 2. Gas chromatography-mass spectroscopy and NMR were used to confirm the configuration of each
丙戊酸(VPA)的两种二烯代谢物分别是(E)-2-n-丙基-2,4-戊二烯酸和(E)-2-(1'-丙烯基)-(E)-2-戊烯酸立体选择性地合成。在2的情况下,最后一步在位置2产生不饱和基的甲磺酸酯消除对(E)-构型是立体定向的。使用气相色谱-质谱和NMR确认每个二烯的构型,包括次要异构体,( Z)-2-正丙基-2,4-戊二烯酸和(Z)-2-(1'-丙烯基)-(E)-2-戊烯酸。通过负化学电离GC-MS对来自VPA治疗患者血清提取物的PFB衍生物进行分析,发现二烯为四个峰,按照洗脱顺序分别对应于9、18、1和2。