Abstract
We have developed a process for the efficient and scalable preparation of heterofunctionalized dodecaethylene glycol from the readily available tetraethylene glycol and its macrocyclic sulfate. By employing the benzyl group as both a protecting group and a separative tag, multiple chromatographic separations were avoided. With this method, α-amino-ω-methyl-dodecaethylene glycol was prepared on a 53 g scale with high purity and 61% overall yield in eight steps and one chromatographic separation.
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