Synthesis of 2-(β-d-glucopyranosylamino)-5-substituted-1,3,4-oxadiazoles for inhibition of glycogen phosphorylase
作者:Marietta Tóth、Béla Szőcs、Tímea Kaszás、Tibor Docsa、Pál Gergely、László Somsák
DOI:10.1016/j.carres.2013.04.025
日期:2013.11
Aromatic aldehyde 4-(2,3,4,6-tetra-O-acetyl-β-d-glucopyranosyl)semicarbazones were synthesized by the addition of different hydrazones onto O-peracetylated β-d-glucopyranosyl isocyanate. Oxidative transformations of these precursors gave O-protected 2-(β-d-glucopyranosylamino)-5-substituted-1,3,4-oxadiazoles. Removal of the O-acetyl protecting groups under Zemplén conditions gave test compounds to
芳香醛4-(2,3,4,6-四-O-乙酰基-β-d-吡喃葡萄糖基)半咔唑酮是通过将不同的hydr加到O-过乙酰化的β-d-吡喃葡萄糖基异氰酸酯上而合成的。这些前体的氧化转化得到O-保护的2-(β-d-吡喃葡萄糖基氨基)-5-取代的1,3,4-恶二唑。在Zemplén条件下除去O-乙酰基保护基团使测试化合物显示出对兔肌肉糖原磷酸化酶b的低微摩尔抑制作用。该系列的最佳抑制剂是4-硝基苯甲醛(Ki =4.5μM),2-萘乙醛(Ki =5.5μM)和2-(β-d-吡喃葡萄糖基氨基)-5-(4-(β-d-吡喃葡萄糖基)半咔唑4-甲基苯基)-1,3,4-恶二唑(Ki =12μM)。