A New Route to Diverse 1-Azasugars from <i>N</i>-Boc-5-hydroxy-3-piperidene as a Common Building Block
作者:Hidekazu Ouchi、Yukiko Mihara、Hiroki Takahata
DOI:10.1021/jo050519j
日期:2005.6.1
for the synthesis of a variety of 1-azasugars with a nitrogen atom at the anomeric position is described. The readily available chiral N-Boc-5-hydroxy-3-piperidene 3 is transformed to isofagomine (2), homoisofagomine (13), and 5‘-deoxyisofagomine (14) via stereoselective epoxidation and regioselective ring-cleavage in a highly stereocontrolled manner. In addition, the synthesis of all four stereoisomers
描述了一种合成具有异头位置氮原子的各种1-氮杂双胍的新的通用方法。易于获得的手性N -Boc-5-羟基-3-哌啶3通过立体选择性环氧化和区域选择性环裂解,以高度立体可控的方式转化为异黄花碱(2),高异黄花碱(13)和5'-脱氧异黄花碱(14)。 。此外,3,4,5- trihydroxypiperidines(所有四种立体异构体的合成18 - 21)被划分为1-azasugar型葡糖苷酶抑制剂是立体选择性地从(手性)啶实现3。