The racemic mixture of the protected β-cyclopropylalaninol derivative 11 was subjected to asymmetric deprotonation by means of sec-butyllithium/(-)-sparteine, resulting in a preferential abstraction of the α-pro-S-H in (R)-11; (S)-11 remains untouched.
保护的β-环丙基丙
氨醇衍
生物11的外消旋混合物通过sec-丁基
锂/(-)-斯巴特宁进行不对称去质子化,导致(R)-11中的α-pro-S-H优先被抽走;而(S)-11则保持不变。