group on the anomeric position are a challenging class of SAAs to synthesize due to the inherent instability of glycosylamines. We developed a novel synthetic strategy towards both furanoid and pyranoid δ-SAAs of this type, based on a Curtius rearrangement. The latter reaction, which is known to proceed with retention of configuration, was performed on carboxylic acids derived from the oxidation of
由于糖基胺固有的不稳定性,在异头位置带有胺基的糖
氨基酸 (S
AA) 是一类难以合成的 S
AA。我们基于 Curtius 重排开发了一种针对此类
呋喃和
吡喃 δ-S
AA 的新型合成策略。已知以保留构型进行的后一反应是在衍生自糖苷伯羟基氧化的
羧酸上进行的。亮
氨酸
脑啡肽类似物是通过用
呋喃类和
吡喃类 δ-S
AA 替换母体亮
脑啡肽五肽中的 Gly-Gly 部分来制备的。(© Wiley-
VCH Verlag GmbH & Co. KG
AA, 69451 Weinheim, Germany, 2003)