The title compounds, galacto-1 and gluco-2, were synthesised from N-acetyl-D-glucosamine via a common 1,4-diol intermediate that underwent transformations involving either a single or double inversion of stereochemistry at C-4, respectively. In the double inversion sequence, the first inversion involved participation by a t-butyloxycarbonylamino group in an intramotecular sulfonate displacement reaction
由
N-乙酰基-D-葡糖胺经由共同的1,4
-二醇中间体合成标题化合物,半
乳糖-1和
葡萄糖-2,所述中间体分别经历了在C-4处立体
化学的一次或两次反转的转化。在双重转化序列中,第一次转化涉及叔丁氧羰基
氨基参与分子内
磺酸盐置换反应并形成新的环状
氨基甲酸酯。