DBU assisted expeditious synthesis of glycosyl dienes via glycosylated β-hydroxy esters
作者:Shyam S. Verma、Namrata Dwivedi、Biswajit K. Singh、Rama P. Tripathi
DOI:10.1016/j.carres.2006.04.021
日期:2006.8
corresponding 3-O-benzyl(methyl)-6-carbethoxy-5,6-dideoxy-1,2-O-isopropylidene-7-phenyl-beta-L- threo-hept-4-enofuranoses. The latter on treatment with methanesulfonylchloride followed by DBU catalyzed E2 reaction of the methanesulfonyloxy intermediates gave the respective 3-O-benzyl(methyl)-6-carbethoxy-5,6,7-trideoxy-1,2-O-isopropylidene-7-phenyl-beta -L-threo-hept-4,6-dienofuranose in moderate to