New metal-free one-pot synthesis of α-2-deoxy-Ulosides by microwave-assisted double Michael Addition of β-enamino ketones
作者:Pin-Chun Lin、Zi-Ping Lin、Po-Yen Chen、Min-Tsang Hsieh、Hui-Chang Lin
DOI:10.1016/j.carres.2022.108712
日期:2023.1
New metal-free one-pot synthesis of α-2-deoxy-ulosides in moderate to good yields by microwave-assisted double Michael addition of various O-nucleophiles to β-enamino ketones in the presence of 12 N HCl. These glycosyl additions occurred with high α-stereoselectivity and were complete in 10–25 min in 51–93% yield. In addition, high α-stereoselectivity was also observed when S-nucleophiles were examined
在 12 N HCl存在下,通过微波辅助将各种O-亲核试剂双迈克尔加成到 β-烯胺酮中,以中等到良好的收率实现 α-2-脱氧-uloside 的新型无金属一锅法合成。这些糖基添加具有高 α-立体选择性,并在 10-25 分钟内完成,产率为 51-93%。此外,当检查S-亲核试剂时,也观察到高 α-立体选择性。