[GRAPHICS]This letter describes the reduction to practice of a novel concept for functionalization of the anomeric carbon of carbohydrates with a nitrogen substituent. Thus, bisheterodienes with a thiono sulfur terminus and a sulfonylimine terminus are shown to undergo cycloaddition smoothly and stereoselectively to three different glycals.
[GRAPHICS]This letter describes the reduction to practice of a novel concept for functionalization of the anomeric carbon of carbohydrates with a nitrogen substituent. Thus, bisheterodienes with a thiono sulfur terminus and a sulfonylimine terminus are shown to undergo cycloaddition smoothly and stereoselectively to three different glycals.
Synthesis of functionalized 2-vinyl-2,3-dihydropyrroles and 3-methylene-1,2,3,4-tetrahydropyridines by palladium-catalyzed cyclization of β-enaminocarbonyl compounds with allylic bisacetates
作者:Masahiro Yoshida、Kouki Kinoshita、Kosuke Namba
DOI:10.1039/c3ob42510j
日期:——
Palladium-catalyzed reactions of β-enaminocarbonyl compounds with 1,4-diacetoxybut-2-ene and 2-methylene-1,3-propanediol diacetate are described.