反应详情

To a solution of crude 3-Iodo-2-{[methoxycarbonylmethyl-(toluene-4-sulfonyl)-amino]-methyl}-benzoic acid methyl ester (37.8 g) in methanol (220 mL) was added a solution of NaOMe (30 wt %) in methanol (40 mL) with stirring. After stirring for 18 h at ambient temperature the mixture was concentrated in vacuo. To the residue was added 1 N hydrochloric acid (200 mL) and the mixture was extracted with hot ethyl acetate (1×300 mL). The organic phase was then washed with concentrated aqueous NaHCO3 solution (3×200 mL), dried over MgSO4 and concentrated in vacuo. The residue was recrystallized from ethyl acetate to give the title compound as a tan solid (10.1 g); MS-(+)-ion: M+1=329.8.

1. stirringAfter stirring for 18 h at ambient temperature the mixture
2. concentrationwas concentrated in vacuo
3. additionTo the residue was added 1 N hydrochloric acid (200 mL)
4. extractionthe mixture was extracted with hot ethyl acetate (1×300 mL)
5. washThe organic phase was then washed with concentrated aqueous NaHCO3 solution (3×200 mL)
6. dry with materialdried over MgSO4
7. concentrationconcentrated in vacuo
8. customThe residue was recrystallized from ethyl acetate