作者:Karl Dax、Brigitte I. Glänzer、Gerhard Schulz、Hermann Vyplel
DOI:10.1016/0008-6215(87)80196-9
日期:1987.4
Abstract The regiospecific syn -addition of acetyl hypofluorite to glycals derived from pentopyranoses led to mixtures of stereoisomers. Stereospecific reactions occurred with furanoid glycals, the direction of addition being governed by the nature of the substituent at C-3. Whereas a benzyloxy group caused attack from the opposite, less-hindered face of the double bond, a hydroxyl group induced addition
摘要乙酰基次萤石向戊基吡喃糖衍生的糖基的区域特异性顺式加成反应导致立体异构体的混合物。呋喃类糖发生立体特异性反应,加成方向受C-3取代基的性质支配。苄氧基从双键相对较少受阻的相反面引起侵蚀,而羟基则从同一侧诱导加成。从这些反应中,β-d-阿拉伯糖-,α-d-核糖-,β-d-lyxo-和α-d-木糖吡喃糖以及β-d-甘露糖的2-脱氧-2-氟衍生物。获得了α,d-葡萄糖,α-d-核糖和β-d-阿拉伯呋喃糖,并给出了它们的1 H-,13 C-和19 Fn.mr数据。