Carbon Dioxide → (2,6-Dimethyl-4-[phenylacetamido]phenylsulfonyl)nitromethane

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Reaction Steps

Phenylacetyl chloride (1.16 g, 7.5 mM) was added to a stirred suspension of calcium carbonate (1.0 g, 10.0 mM) and (4-amino-2,6-dimethylphenylsulfonyl)nitromethane (1.22 g, 5.0 mM) in dry tetrahydrofuran (THF; 20 mL). The mixture was stirred for 16 hours during which time carbon dioxide was slowly released. Ethanol (1.0 mL) was then added and the mixture stirred for a further hour in order to decompose excess phenylacetyl chloride. Ethyl acetate (100 mL) was then added and the insoluble material removed by filtration. The filtrate was washed first with water (50 mL) containing 2M hydrochloric acid (2.0 mL) and then with saturated sodium chloride solution (2×40 mL) and then dried (MgSO4). The solvent was evaporated and the residue recrystallised from ethyl acetate. The solid obtained was washed with ether and air dried to give (2,6-dimethyl-4-[phenylacetamido]phenylsulfonyl)nitromethane as white crystals, having m.p. 158°-159 ° C. and in 54% yield after recrystallisation from ethanol; microanalysis, found: C, 56.7; H, 5.0; N, 8.0%; C17H18N2O5S requires: C, 56.4: H, 5.0; N, 7.7%.

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