An Improved Method for the Preparation of Protected (R)-2-Methylcysteine: Solution-Phase Synthesis of a Glutathione Analogue
作者:Douglas Masterson、Brant Kedrowski、Amanda Blair
DOI:10.1055/s-0030-1259021
日期:2010.12
A synthetic method for the preparation of (R)-2-methylcysteine that dramatically improves the overall yield of this important unnatural amino acid has been refined. The key steps in the preparation of (R)-2-methylcysteine were improved such that necessary intermediates were prepared in high yields and of sufficient purity to avoid the need for distillation or column chromatography. The (R)-2-methylcysteine was prepared (>90% ee) in appropriately protected form and used in a novel solution phase synthesis of a glutathione analogue.
一种制备 (R)-2-甲基半胱氨酸的合成方法已得到改进,该方法可显着提高这种重要非天然氨基酸的总产率。对(R)-2-甲基半胱氨酸制备中的关键步骤进行了改进,从而以高产率和足够的纯度制备了必要的中间体,从而避免了蒸馏或柱色谱的需要。 (R)-2-甲基半胱氨酸以适当保护的形式制备(>90% ee),并用于谷胱甘肽类似物的新型溶液相合成。