反应详情

To a solution of 4-(methylsulfonamidomethyl)benzoic acid (0.4 g, 1.745 mmol) and benzyl 2-hydroxyacetate (0.290 g, 1.745 mmol) in a mixture of DCM and THF 1/1 (50 ml), EDC (0.334 g, 1.745 mmol) and DMAP (0.256 g, 2.094 mmol) were added in one portion. The reaction was stirred at RT for 3 hours. The solvent was removed under vacuum and the resulting crude was portioned between EtOAc and HCl 2N. The organic phase was separated, washed with brine and dried over Na2SO4. The solvent was removed under vacuum affording 2-(benzyloxy)-2-oxoethyl 4-(methylsulfonamido-methyl)benzoate (0.4 g, 1.060 mmol, 60.7% yield, MS/ESI+ 377.9 [MH]+). This product was employed in the following step without any further purification.

1. additionwere added in one portion
2. customThe solvent was removed under vacuum
3. customThe organic phase was separated
4. washwashed with brine
5. dry with materialdried over Na2SO4
6. customThe solvent was removed under vacuum