Abstract The title compounds and two diastereoisomers were prepared from (5 RS )-3- O -benzyl-5,6-dideoxy-5- C -[( RS )-(ethoxy)phenylphosphinyl]-1,2- O -isopropylidene-α- d - xylo -hexofuranoses upon reduction with sodium dihydrobis(2-methoxyethoxy)-aluminate, followed by hydrolysis with mineral acid, and acetylation with acetic anhydride-pyridine. Among these products, the two readily crystallized
                                    摘要由(5 RS)-3-O-苄基-5,6-二脱氧-5-C-[(RS)-(乙氧基)苯基次膦基] -1,2-O-异亚丙基-制备了标题化合物和两种非对映异构体。用二氢双(2-甲氧基乙氧基)-
铝酸钠还原后,再用
无机酸水解,再用
乙酸酐-
吡啶乙酰化,得到α-d-
木糖基
呋喃糖酶。在这些产物中,通过X-射线晶体学分析确定两种易于结晶的化合物为1,2,3,4-四-O-乙酰基-5,6-二脱氧基-5-C-[(S)-苯基次膦基] -α-和-β-l-
吡喃
葡萄糖-4 C 1。