乙酸酐 、 1-deoxy-1-<(2,2-dimethoxycarbonylvinyl)amino>-D-fructose 在
吡啶 作用下,
生成
3,4,5-tri-O-acetyl-1-deoxy-1-<(2,2-dimethoxycarbonylvinyl)-amino>-β-D-fructopyranose 、
2,3,4,5,6-penta-O-acetyl-1-deoxy-1-<(2,2-dimethoxycarbonylvinyl)amino>-D-arabino-hex-1-enitol 、
2-{[((2S,3S,4R,5R)-3,4-Diacetoxy-5-acetoxymethyl-2-hydroxy-tetrahydro-furan-2-ylmethyl)-amino]-methylene}-malonic acid dimethyl ester 、 2-{[((3S,4R,5R)-2,3,4-Triacetoxy-5-acetoxymethyl-tetrahydro-furan-2-ylmethyl)-amino]-methylene}-malonic acid dimethyl ester