A convenient synthesis of novel pyranosyl homo-C-nucleosides and their antidiabetic activities
作者:Surendra Singh Bisht、Natasha Jaiswal、Anindra Sharma、Seerat Fatima、Rahul Sharma、Neha Rahuja、A.K. Srivastava、Vikas Bajpai、Brijesh Kumar、Rama P. Tripathi
DOI:10.1016/j.carres.2011.03.006
日期:2011.7
A series of pyranosyl homo-C-nucleosides have been synthesized by reaction of butenonyl C-glycosides (5a-5j, and 8) and cyanoacetamide in presence of t-BuOK followed by further modifications. The reaction proceeds by Michael addition of cyanoacetamide to the butenonyl C-glycosides and subsequent dehydrative cyclization and oxidative aromatization to give glycosylmethyl pyridones (6a-6j, 7a-7j, 9, and
通过在t-BuOK存在下丁烯酰基C-糖苷(5a-5j和8)与氰基乙酰胺的反应,然后进一步修饰,合成了一系列吡喃糖基-C-核苷。该反应通过将氰基乙酰胺迈克尔加成到丁烯酰基C-糖苷中,然后进行脱水环化和氧化芳构化而得到糖基甲基吡啶酮(6a-6j,7a-7j,9和10)。与POCl(3)在回流下反应的糖基甲基吡啶酮(6a-6e)以良好的产率得到了相应的糖基甲基吡啶(11a-11e和12a-12e)。筛选合成的化合物的体外α-葡萄糖苷酶,葡萄糖-6-磷酸酶和糖原磷酸化酶抑制活性。吡啶甲基甲基-C-核苷之一,化合物11d,