(S)-3-Tosyloxy-1,2-propanediol[(S)-2] has been synthesized from (S)-2,2-dimethyl-1,3-dioxolane-4-methanol [(S)-1] in four steps with an overall yield of 87%. This coupled with the existing method in the literature for the conversion of (S)-1 to (R)-2 allows both (R)- and (S)-2 to be readily available from either (S)- or (R)-1. The use of the tert-butyldiphenylsilyl protecting group permits two acid labile protecting groups to be incorporated simultaneously. Selective reactions and deprotections lead to the desired configuration.
(S)-3-Tosyloxy-1,2-propanediol[(S)-2] 是由 (S)-2,2-二甲基-
1,3-二氧戊环-4-
甲醇 [(S)-1] 经过四个步骤合成的,总收率为 87%。这与文献中现有的将(S)-1 转化为(R)-2 的方法相结合,使得(R)-和(S)-2 都可以很容易地从(S)-或(R)-1 中获得。使用叔丁基二苯基
硅烷保护基团可以同时加入两个酸性保护基团。通过选择性反应和脱保护作用可以得到所需的构型。