tert-butyl 2-(bromomethyl)acrylate 、 2-acetamido-3-azido-4,6-O-benzylidene-1,2,3-trideoxy-1-nitro-D-mannopyranose 在
2-羟基丙烷-1,2,3-三羧酸根 、
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
生成
tert-butyl 5-acetamido-6-azido-7,9-O-benzylidene-2,3,5,6-tetradeoxy-2-methylidene-D-manno-nonulopyranosonate 、 5-acetamido-6-azido-7,9-O-benzylidene-2,3,5,6-tetradeoxy-2-methylidene-α-D-manno-4-nonulo-4,8-pyranosono-1,4-lactone 、 tert-butyl 5-acetamido-6-azido-7,9-O-benzylidene-2,3,5,6-tetradeoxy-2-methylidene-D-manno-4 nonulosonate