作者:Zhang, Jianhong、Koyama, Tetsuo、Matsushita, Takahiko、Hatano, Ken、Matsuoka, Koji
DOI:10.1016/j.tetlet.2024.155189
日期:——
thioglycoside with simple alcohols proceeded smoothly to yield the corresponding α-glycosides in good yields after isolation. The results suggested that the glycosylation reaction using the oxazolidinone derivative of sialic acid has excellent α-stereoselectivity and enables easy isolation of the desired product from the reaction mixture.
从已知的 Neu5Ac 硫代糖苷中高效合成了衍生自 β-乙酰基神经氨酸的恶唑烷酮月桂基硫代糖苷。通过三氟甲磺酸三甲基甲硅烷基酯(TMSOTf)和碘代琥珀酰亚胺(NIS)作为组合介体系统评估了恶唑烷酮的β-糖苷化反应活性。月桂基硫代糖苷与简单醇的糖苷化反应顺利进行,分离后以良好的产率生成相应的α-糖苷。结果表明,使用唾液酸恶唑烷酮衍生物的糖基化反应具有优异的α-立体选择性,并且能够容易地从反应混合物中分离出所需产物。