[N:1]1([S:7]([C:10]2[CH:15]=[CH:14][C:13]([N+:16]([O-])=O)=[CH:12][CH:11]=2)(=[O:9])=[O:8])[CH2:6][O:5][CH2:4][O:3][CH2:2]1>[Pd].C(O)C.C(OCC)(=O)C>[N:1]1([S:7]([C:10]2[CH:15]=[CH:14][C:13]([NH2:16])=[CH:12][CH:11]=2)(=[O:8])=[O:9])[CH2:2][O:3][CH2:4][O:5][CH2:6]1A mixture of 1-(3,5-dioxapiperidin-1-yl)sulphonyl-4-nitrobenzene (Method 8) (500 mg, 1.82 mmol) and 10% palladium on charcoal catalyst (150 mg) in ethanol (25 ml) and ethyl acetate (25 ml) was stirred under an atmosphere of hydrogen for 3 hours. The catalyst was removed by filtration through diatomaceous earth and the filter pad was washed with ethanol and ethyl acetate. The volatiles were removed from the filtrate by evaporation and the residue triturated with ether and hexane to give the tide compound (395 mg, 88%). NMR: 4.90 (s, 2H) 5.10 (s, 4H), 6.02 (s, 2H), 6.58 (d, 2H), 7.50 (d, 2H).
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