反应详情

108 mg of (1R,2S,3R,5R,6R)-2-amino-3-(3,4-dichlorobenzylsulfonyl)-6-fluoro-bicyclo[3.1.0]hexane-2,6-dicarboxylic acid diethyl ester was stirred in 1.08 mL of 60% sulfuric acid (W/V %) for 3 days at 130° C. The reaction solution was ice-cooled and then neutralized in an aqueous solution of 5N sodium hydroxide. The mixture was stirred for 1 hour at room temperature and then purified by ion exchange resin (AG 50W-X8 Resin (H form), eluent: water, a 30% aqueous solution of tetrahydrofuran and a 10% aqueous solution of pyridine), thereby yielding 76 mg of (1R,2S,3R,5R,6R)-2-amino-3-(3,4-dichlorobenzylsulfonyl)-6-fluoro-bicyclo[3.1.0]hexane-2,6-dicarboxylic acid.

1. temperaturecooled
2. custompurified by ion exchange resin (AG 50W-X8 Resin (H form), eluent