作者:Isidoro Izquierdo Cubero、Rafael Martinez Martinez
DOI:10.1016/s0008-6215(00)84966-6
日期:——
Abstract The reaction of methyl 3,5- O -isopropylidene-β- d - threo -pentofuranosid-2-ulose ( 1 ) with methylmagnesium iodide or methyl-lithium gave methyl 3,5- O -isopropylidene-2- C -methyl-β- d -lyxofuranoside ( 3 ). Compound 1 reacted with diazomethane to give a spiro -epoxide that was reduced to yield 5 , the C-2 epimer of 3 . On the other hand, the anomer ( 2 ) of 1 reacted with methylmagnesium
摘要甲基3,5-O-异亚丙基-β-d-苏-戊呋喃糖基-2-ulose(1)与甲基碘化镁或甲基锂反应生成甲基3,5-O-异亚丙基-2-C-甲基- β-d-呋喃呋喃糖苷(3)。化合物1与重氮甲烷反应生成螺环氧化物,还原生成5,即C-2差向异构体3。另一方面,1的端基异构体(2)与甲基碘化镁或甲基锂反应,得到甲基3,5-O-异亚丙基-2-C-甲基-α-d-二甲苯基-(6)和-lyxo-呋喃糖苷分别。2与重氮甲烷的反应和所得环氧化物的还原得到相同的支链糖。3和6的酸水解分别得到2-C-甲基-d-木糖和2-C-甲基-d-木糖(14)。将化合物14转化为1,2:4,5-二-O-异亚丙基衍生物。