Ethyl 5,6,7,8-tetra-O-acetyl-3,4-dideoxy-d-arabino-oct-2-ulosonate and ethyl 3,4-dideoxy-5,6:7,8-di-O-isopropylidene-d-arabino-oct-2-ulosonate have been synthesised from peracetylated and bisacetonated aldehydo-d-arabinose respectively by a two stage procedure: Wittig reaction and catalytic hydrogenation. Deprotection of the blocked ethyl oct-2-ulosonate afforded the 3,4-dideoxy-d-arabino-oct-2-ulosonic
乙基-5,6,7,8-四ø -乙酰基-3,4-二脱氧D-阿糖-辛-2- ulosonate和乙基3,4-二脱氧-5,6-:7,8-二- ø -异亚丙基-d-
阿拉伯糖-oct-2-ulosonate分别由过乙酰化和双
丙酮化的醛基-d-
阿拉伯糖通过两个步骤合成:Wittig反应和催化氢化。脱保护被保护的辛-2-
磺酸乙酯,得到3,4-二脱氧-d-
阿拉伯糖-辛-2-
磺酸(4-脱氧-KDO),以其
钙盐的形式从d得到,总收率为37%。 -
阿拉伯糖。同样地,d-
木糖的反应产生了3,4-dideoxy-d- xylo
钙-oct-2-ulosonate的总收率为34%。两种
钙盐均被衍生为结晶
喹喔啉四
乙酸盐。还介绍了其他尝试的路线。