Synthesis and transformations of [1,2-O-isopropylidene-α-d-erythro (and α-d-ribo)furanose]-3-spiro-3′-(4′-amino-5′H-2′,3′-dihydroisothiazole-1′,1′-dioxide) derivatives
作者:Albert Nguyen Van Nhien、Laura Domı́nguez、Cyrille Tomassi、M Rosario Torres、Christophe Len、Denis Postel、José Marco-Contelles
DOI:10.1016/j.tet.2004.03.063
日期:2004.5
protocols) of glyco-α-sulfonamidonitriles derived from readily available uloses 1A and 1B have been investigated using different bases (potassium carbonate, cesium carbonate, LDA and n-BuLi). As a result, a series of enantiomerically pure [1,2-O-isopropylidene-α-d-erythro (and α-d-ribo)furanose]-3-spiro-3′-(4′-amino-5′H-2′,3′-dihydroisothiazole-1′,1′-dioxide) derivatives have been prepared and isolated
已经使用不同的碱(碳酸钾,碳酸铯,LDA和正丁基锂)研究了衍生自易得的uloses 1A和1B的糖-α-磺酰胺基腈的碳负离子介导的磺酰胺环化(CSIC协议)。结果,产生了一系列对映体纯的[1,2 - O-异亚丙基-α-二赤(和α-d-核糖)呋喃糖] -3-spiro-3'-(4'-amino- 5'H -2',3'-二氢异噻唑-1',1'-二氧化物)衍生物已经制备并以高收率分离。