反应详情

Into a 20 mL vial was added 161 mg (0.75 mmol) of 3,5 dimethoxy, 4-methyl benzoyl chloride, a 5 mL solution of 3-methoxy-2-methyl-benzoic acid N′-(1-ethyl-2,2-dimethyl-propyl)-hydrazide, and 1.5 mL of aqueous 25% K2CO3. The reaction mixture was stirred at room temperature for 24 hours. The reaction mixture was transferred to a separatory funnel with CH2Cl2 and shaken with dilute aqueous NaHCO3. The organic phase was dried, concentrated and chromatographed on silica. 100 mg of pure product, 3,5-dimethoxy-4-methyl-benzoic acid N-(1-ethyl-2,2-dimethyl-propyl)-N′-(3-methoxy-2-methyl-benzoyl)-hydrazide, was eluted with 25% ethyl acetate/hexane. TLC: Rf=0.54 (1:1 ethyl acetate:hexane); 1H NMR (CDCl3, 300 MHz) δ (ppm): 6.6-7.2 (m, 4H), 6.25 (d, 1H), 4.6 (d, 1H), 3.8-3.95 (br s, 9H), 2.1 (br s, 3H), 1.9 (s, 3H), 1.6 (br, 2H), 1.3 (m, 3H), 0.9-1.2 (br d, 9H).

1. customThe organic phase was dried
2. concentrationconcentrated
3. customchromatographed on silica
4. wash100 mg of pure product, 3,5-dimethoxy-4-methyl-benzoic acid N-(1-ethyl-2,2-dimethyl-propyl)-N′-(3-methoxy-2-methyl-benzoyl)-hydrazide, was eluted with 25% ethyl acetate/hexane