反应详情

{2-[4-(3-Trifluoromethyl-phenoxy)-phenyl]-ethyl}-carbamic acid tert-butyl ester (333 mg, 0.873 mmol, 1 eq) was dissolved in dry THF (4.5 ml) and NaH, 60% (101 mg, 2.53 mmol, 2.9 eq) was added. After 30 min, the reaction mixture was treated with methyl iodide (545 μl, 8.73 mmol, 10 eq) and was stirred overnight. After overnight the excess NaH was quenched by a slow addition of water, diluted with brine (30 ml) and extracted with Et2O (3×20 ml). Combined organic layers were dried over anhydrous Na2SO4, filtered and evaporated to give a product methyl-{2-[4-(3-trifluoromethyl-phenoxy)-phenyl]-ethyl}-carbamic acid tert-butyl ester (306 mg, yield=78%, purity=88%). [M+H]+=396.43 1H NMR (300 MHz; CDCl3) δ/ppm 1.43 (s, 9H), 2.74-2.93(m, 5H), 3.44 (t, J=8.53 Hz, 2H), 6.92-6.99 (m, 2H), 7.09-7.24 (m, 4H), 7.29-7.35 (m, 1H), 7.37-7.45 (m, 1H)

1. customAfter overnight the excess NaH was quenched by a slow addition of water
2. additiondiluted with brine (30 ml)
3. extractionextracted with Et2O (3×20 ml)
4. dry with materialCombined organic layers were dried over anhydrous Na2SO4
5. filtrationfiltered
6. customevaporated