反应详情

To a stirred solution of tert-butyl 4-amino-3-methoxyphenylacetate (1.94 g, 8.16 mmol) in THF (20 ml) was added 2-iodophenylisocyanate (2.0 g, 8.16 mmol) and Et3N (114 ul, 0.816 mmol). After stirring overnight, the mixture was poured into 1 N HCl (200 ml). The resulting precipitate was collected by filtration and dissolved in CHCl3 (200 ml). The solution was dried over MgSO4 and evaporated to give tert-butyl 4-[N′-(2-iodophenyl)ureido]-3-methoxyphenylacetate (3.93 g, quant) as a pale yellow amorphous solid 1H-NMR (CDCl3) δ1.44 (s, 9 H), 3.49 (s, 2 H), 3.85 (s, 3 H), 6.78-6.88 (m, 4 H), 7.07 (s, 1 H), 7.31-7.35 (m, 1 H), 7.76 (dd, J=7.8, 1.5 Hz, 1 H), 7.95 (d, J=8.3 Hz, 1 H), 7.99 (dd, J=8.3, 1.5 Hz, 1 H). MS (ESI), m/z 483 (M++1).

1. filtrationThe resulting precipitate was collected by filtration
2. dissolutiondissolved in CHCl3 (200 ml)
3. dry with materialThe solution was dried over MgSO4
4. customevaporated