Reaction of acetyl hypofluorite with pyranoid and furanoid glycals
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
A rapid, stereoselective synthesis of fluorinated carbohydrates: Addition of acetyl hypofluorite to vinyl ether derivatives of sugars
作者:Michael J. Adam、Brian D. Pate、Jean-Richard Nesser、Laurance D. Hall
DOI:10.1016/0008-6215(83)88457-2
日期:1983.12
added to six unsaturated carbohydrates that contain a vinyl ether moiety. All reactions were rapid (5 min at −78°) and gave, with one exception, high yields of isomerically pure products. The hypofluorite was shown to add exclusively in the cis mode, with a strong tendency to attack on a particular “face” of the double bond. As well as the syntheses, n.m.r. data and favored conformations of the fluorinated