作者:Denis-Pierre Neff、Yuanwei Chen、Pierre Vogel
DOI:10.1002/hlca.19910740307
日期:1991.5.2
approach to the total, asymmetric synthesis of D-threo-L-talo-octose ((−)-1) and its derivatives is presented. It is based on the chemoselective Wittig-Horner monoolefination of a 5-deoxy-D-ribo-hexodialdose derivative 4 obtained by selective reduction of (−)-5-deoxy-2.3-O-isopropylidene-/β-D-ribo-hexofuranurono-6,1-lactone ((−)-3). Allylic bromination of the resulting methyl (E)-oct-6-enofuranuronate (+)-5
一种新的方法,以总,D-的不对称合成苏-L-距骨-octose(( - ) - 1)被呈现及其衍生物。其基于通过选择性还原(-)-5-脱氧-2.3 - O-异亚丙基-/β-D-核糖-六呋喃呋喃诺糖而获得的5-脱氧-D-核糖-己二醛糖衍生物4的化学选择性维蒂希-霍纳单烯烃化反应。 -6,1-内酯((-)- 3)。所得(E)-oct-6-enofuranuronate甲酯(+)- 5的烯丙基溴化反应,然后分子内亲核置换所得溴化物,得到13.3:1的(-)-甲基(-)甲基混合物E)-1,4-脱水-6,7-二脱氧-2,3- O-异亚丙基-β-L - talo-oct-6-enopyranuronate((-)- 8)和甲基(E)-1,4 -anhydro基-6,7-二去氧-2,3- ö异亚丙基α-D-同种异体-辛-6- enopyranuronate(9)。烯酸酯(-)- 8的双羟基化遵循Kish