Acylation of carbohydrates over Al2O3: preparation of partially and fully acylated carbohydrate derivatives and acetylated glycosyl chlorides
作者:Pallavi Tiwari、Anup Kumar Misra
DOI:10.1016/j.carres.2005.11.035
日期:2006.2
protocol does not require the addition of any base or activator. This methodology has been further extended to the selective acylation of carbohydrate diols and the one-pot preparation of acetylated glycosyl chlorides directfrom free reducingsugars. The yields obtained in most of the cases are excellent.
Selective mono-acylation of 1,2- and 1,3-diols using (α,α-difluoroalkyl)amines
作者:Natsumi Wakita、Shoji Hara
DOI:10.1016/j.tet.2010.08.029
日期:2010.10
3-diols, selective mono-benzoylation occurs to afford mono-esters of the diols in good yield. The reaction is completed under mild conditions in a short reaction time. Further, prim-, sec-, and tert-diols and catechol can be converted to the corresponding mono-benzoates. DFBA is used for the protection of the hydroxy group in sugars. The selective mono-nicotinylation, formylation and pivaloylation of diols