Synthesis of<i>C</i>-Glycosyl Isoxazoles and Branched-Chain Enuloses From 2,3-<i>O</i>-Isopropylidene-D-Glyceraldehyde
作者:J. M. Báñez Sanz、J. A. López Sastre、M. R. Patiño Molina、C. Romero-Ávila García
DOI:10.1080/07328309808002357
日期:1998.12
The synthesis of 5-glycosyl isoxazoles with 3-alkyl-, 3-aryl, 3,4-dialkyl, 3-aryl-4-alkyl or 3-alkyl-4-bromo substituents is reported. Deoxyenuloses were obtained from reaction of 2,3-O-isopropylidene-D-glyceraldehyde and several phosphorus ylides, which contain a carbonyl group, by a Wittig reaction. C-glycosyl α,β-unsaturated ketones were obtained, with the polyhydroxylate chain lengthened by two
报道了具有3-烷基-,3-芳基,3,4-二烷基,3-芳基-4-烷基或3-烷基-4-溴取代基的5-糖基异恶唑的合成。通过Wittig反应,由2,3 - O-异亚丙基-D-甘油醛与几种含有羰基的磷酰化物的反应获得脱氧核糖。得到C-糖基α,β-不饱和酮,其多羟基化物链延长了两个或三个碳原子。在第二阶段中,将酮转化为相应的C-糖基α,β-不饱和酮肟,生成C-糖基异恶唑,通过除去适当保护的碳水化合物的异亚丙基将其转化为标题化合物。合成后的溶解度通过游离羟基对C-糖基异恶唑进行修饰,从而可以研究其对某些病毒的行为及其潜在的抗病毒活性。