作者:Jaideep Saha、Mark W. Peczuh
DOI:10.1016/j.tetlet.2012.08.039
日期:2012.10
Septanosyl fluorides, prepared from protected pyranoses, were used as donors in glycosylation reactions. The fluorides were synthesized by the addition of vinyl Grignard to the pyranoses followed by ozonolysis and then DAST-mediated fluorination. Activation in the presence of nucleophiles then provided the product glycosides. High α-stereoselectivity was observed for glycosylations using a donor that
由受保护的吡喃糖酶制备的Septanosyl氟化物用作糖基化反应的供体。通过将乙烯基格利雅(Grignard)添加到吡喃糖中,然后进行臭氧分解,然后进行DAST介导的氟化反应来合成氟化物。然后在亲核试剂存在下活化提供了产物糖苷。使用具有游离C 2羟基的供体观察到糖基化的高α-立体选择性。提出了一个羟基参与指导立体化学结果的模型。