Ready Preparation of Furanosyl<i>n</i>-Pentenyl Orthoesters from Corresponding Methyl Furanosides
作者:Changalvala V. S. Ramamurty、Parimala Ganney、C. Srinivas Rao、Bert Fraser-Reid
DOI:10.1021/jo1021376
日期:2011.4.1
The 3,5-di-O-benzoyl n-pentenyl orthoesters of the four pentofuranoses have been prepared. The first key intermediate in each case is the methyl pentofuranoside(s), and a user-friendly procedure for the preparation of each, based on the Callam−Lowary precedent, is described, whereby formation of the crucial α/β anomeric mixture is optimized. The mixture is used directly to prepare the corresponding
已经制备了四个戊呋喃糖酶的3,5-二-O-苯甲酰基正戊烯基原酸酯。在每种情况下,第一个关键中间体是甲基呋喃呋喃糖苷,并且根据Callam-Lowary的先例,描述了一种方便的制备方法,用于制备每种戊呋喃糖苷,从而优化了关键的α/β异头混合物的形成。将该混合物直接用于制备相应的过苯甲酰化的呋喃呋喃糖基溴化物,然后制备标题化合物。