乙酸酐 、
N-(2,3,4,6-tetra-O-benzyl-α-D-glucopyranosyl)-N'-<(1S)-2,3,4,5-tetrahydroxy-2-(hydroxymethyl)cyclopentyl>thiourea 在
sodium 、
mercury(II) oxide 作用下,
生成 (1R,5S,6R,7S,8S)-7,8-diacetoxy-6-acetoxymethyl-4-acetyl-6-hydroxy-3-(2,3,4,6-tetra-O-acetyl-α-D-glucopyranosylimino)-2-oxa-4-azabicyclo<3.3.0>octane 、 (1R,5S,6R,7S,8S)-6,7,8-triacetoxy-1-acetoxymethyl-4-acetyl-3-(2,3,4,6-tetra-O-acetyl-α-D-glucopyranosylimino)-2-oxa-4-azabicyclo<3.3.0>octane