反应详情

温度

0 °C

To a solution of N-methoxy-N-methyl-3-(4-chlorophenyl)-2-phenylpropanamide (Step C, 16 g, 53 mmol, dried by azeotroping with toluene) in anhydrous tetrahydrofuran (200 mL) at 0° C. was added methylmagnesium bromide (3 M in ether, 35 mL, 0.11 mol). After stirring at 0° C. for 2 h, the reaction was quenched with methanol (5 mL) and 2 M hydrochloric acid (50 mL). The volatile materials were removed by concentrating on a rotary evaporator and the residue partitioned between saturated ammonium chloride (200 mL) and ether (200 mL). The organic layer was separated, and the aqueous layer was extracted with ether (2 times 200 mL) The combined organic extracts were dried over anhydrous magnesium sulfate, filtered and concentrated to dryness to give the title compound, which was used without further purification. 1H NMR (500 MHz, CD3OD): δ 7.45-7.02 (m, 9H), 4.08 (dd, 1H), 3.34 (dd, 1H), 2.90 (dd, 1H), 2.03 (s, 3H).

1. customthe reaction was quenched with methanol (5 mL) and 2 M hydrochloric acid (50 mL)
2. customThe volatile materials were removed
3. concentrationby concentrating on a rotary evaporator
4. customthe residue partitioned between saturated ammonium chloride (200 mL) and ether (200 mL)
5. customThe organic layer was separated
6. extractionthe aqueous layer was extracted with ether (2 times 200 mL) The combined organic extracts
7. dry with materialwere dried over anhydrous magnesium sulfate
8. filtrationfiltered
9. concentrationconcentrated to dryness