作者:Daniela Fattori、Pierre Vogel
DOI:10.1016/s0040-4020(01)88356-3
日期:1992.11
followed by acetylation and Baeyer-Villiger oxidation of the resulting α-acetoxyketone (−)-14 afforded (−)-5-O-acetyl-2-O-benzyl-3-deoxy-β-D-arabino-hexofuranurono-6,1-lactone ((−)-15). This compound was converted readily into (+)-methyl 3-deoxy-α-D-arabino-hexofuranoside ((+)-6 and (+)-methyl 3-deoxy-β-L-xylo-hexofuranoside ((+)-7) and partially protected derivatives. (−)-15 was also converted into 4-de
(1 S,4 S)-7-氧杂双环[2.2.1]庚-5-烯-2-酮((-)- 5,“裸糖”)已转化为(-)-(1 R, 4 S,6 S)-6-内-苄氧基-2-溴-7-氧杂双环[2.2.1]庚-2-烯((-)- 12)以高度立体选择性的方式存在。(-)- 12的CC双键进行双羟基化,然后对所得的α-乙酰氧基酮(-)- 14进行乙酰化和Baeyer-Villiger氧化,得到(-)-5-O-乙酰基-2-O-苄基-3-脱氧-β-D-阿拉伯糖-六呋喃呋喃基-6,1-内酯((-)- 15)。该化合物易于转化为(+)-甲基3-脱氧-α-D-阿拉伯糖-六呋喃糖苷((+)- 6和(+)-甲基3-脱氧-β-L-二甲苯基-六呋喃糖苷((+)- 7)和部分保护的衍生物。(-)- 15也被转化为4-脱氧- D-来苏-hexopyranose(34)和几个部分保护的衍生物,例如(+) -甲基-4-脱氧-2,3-