反应详情

tert-Butyl 4-[5-bromo-2-benzyloxybenzylamino]benzoate (16.9 g) and methyl-4-bromomethylbenzoate were dissolved in in dimethylformamide (30 ml) and potassium carbonate (18 g) added. The mixture was stirred at ambient temperature for 24 hours and then poured into water (300 ml). The reaction mixture was extracted with ether (4×100 ml). The combined ether extracts were washed with water (3×100 ml) and brine (1×100 ml), dried over magnesium sulphate and evaporated. The residue was purified by MPLC eluting with 1:1 dichloromethane/hexane to give tert-butyl 4-[N-(5-bromo-2-benzyloxybenzyl)-N-(4-methoxycarbonylbenzyl)amino]benzoate (3.6 g) m.p. 154-155° C.

1. additionadded
2. extractionThe reaction mixture was extracted with ether (4×100 ml)
3. washThe combined ether extracts were washed with water (3×100 ml) and brine (1×100 ml)
4. dry with materialdried over magnesium sulphate
5. customevaporated
6. customThe residue was purified by MPLC
7. washeluting with 1:1 dichloromethane/hexane