The 4-(<i>tert</i>-Butyldiphenylsiloxy)-3-fluorobenzyl Group: A New Alcohol Protecting Group, Fully Orthogonal with the <i>p</i>-Methoxybenzyl Group and Removable under Desilylation Conditions
作者:David Crich、Linfeng Li、Michio Shirai
DOI:10.1021/jo900026e
日期:2009.3.20
ether-type protecting group for alcohols, the 4-(tert-butyldiphenylsiloxy)-3-fluorobenzyl group, is introduced. The protecting group is introduced by means of the readily prepared benzyl bromide and is cleaved with tetrabutylammonium fluoride in dimethylformamide under microwave irradiation. The fluoride substituent provides stability to oxidizing conditions, such that the new protecting group is fully
引入了一种新的苄基醚型醇保护基团,4-(叔丁基二苯基硅氧基)-3-氟苄基。保护基通过容易制备的苄基溴引入,并在微波辐射下用四丁基氟化铵在二甲基甲酰胺中裂解。氟化物取代基提供了对氧化条件的稳定性,使得新的保护基团与用DDQ去除对甲氧基苄基醚完全相容。介绍了新的保护基团在直接立体控制合成β-吡喃甘露糖苷中的应用。