simple and convenient route to 3 alpha- and 3 beta-amino-5 beta-cholan-24-oic acids was developed via Leuckart-Wallach amination reduction and subsequent acid hydrolysis. Two epimeric formylamino derivatives were produced (alpha and beta), approximately in a 1:1 ratio, as determined by 13C nuclear magnetic resonance spectroscopy. The two isomers were separated by making use of their different solubilities
通过Leuckart-Wallach的胺化还原反应和随后的酸
水解,开发了一种简单且方便的途径,可制得3α-和3β-
氨基-5β-cholan-24-oic酸。通过13 C核磁共振波谱测定,生成了两种差向异构甲酰
氨基衍
生物(α和β),其比例约为1:1。通过使用它们在
乙醚中的不同溶解度来分离这两种异构体。通过与真实参考样品进行比较,确定了两种
氨基酸的绝对构型。