6-trideoxy-α- l - threo -hex-3-enopyranosyl) derivative (87%). This was converted into the erythro derivative by an oxidation-reduction sequence. cis -Hydroxylation of the double bond by N -methylmorpholine N -oxide and a catalytic amount of osmium tetraoxide gave a disaccharide (62%), which was converted by mild, acid hydrolysis into 3- O -α- l -fucopyranosyl- d -glucose. In the same way, 3- O -(2,3-anhydro-4-deoxy-α-
摘要还原了1,2:5,6-异亚丙基-3-O-(2,3,4-三苯氧基-α-1-
甘油-己基-2-己
吡喃糖基)-α-d-
葡萄糖呋喃糖的伯醇基。对
甲苯磺酰化,
碘取代和三
丁基锡烷处理,得到6'-脱氧衍
生物,将其转化为2,3-脱
水-(81%)和-
核糖-
环氧化物(8.5%)。通过用
碘化三甲基甲
硅烷基酯,
DBU和
氟化物的连续处理进行异构化,得到3-O-(3,4,6-三苯氧基-α-l-苏式-hex-3-enopyranosyl)衍
生物(87%)。通过氧化-还原序列将其转化为赤型衍
生物。
N-甲基吗啉N-氧化物对双键的顺式-羟基氧化作用和催化量的四氧化os产生了二糖(62%),通过温和的酸
水解将其转化为3- O-α-1-
呋喃核糖基d-
葡萄糖。同样,3- O-(2,3-脱
水-4-脱氧-α-d-lyxo-己基
吡喃糖基)-1,2:5,6-二-O-异亚丙基-α-d-
葡糖呋喃糖被异构化为3-O-(3,4-dideoxy