Ethyl Acetate → N-8-Phenyloctyl-3,5-bis-(3,5-dimethylphenyl)-4-(2-hydroxyethoxy)benzamide

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Reaction Steps

To a cooled solution (0° C.) of 8-phenyloctyl amine (1.56 g, 7.58 mmol, 1.51 ml) in 10 mL anhydrous THF was added n-BuLi (5.1 mL, 7.96 mmol) as a solution in hexanes dropwise. After the addition, the reaction was warmed up to room temperature and was stirred for one-half hour at room temperature. Then the lithiated amine was cooled back down to 0° C. and was added to a cooled (0 ° C. ) solution of 3,5-bis-(3,5-dimethylphenyl)-4-(2-hydroxyethoxy)benzoic acid ethyl ester (1.04 g, 2.49 mmol) in 10 mL anhydrous THF. The resulting reaction mixture was stirred for 5 min at 0° C. then allowed to warm up to room temperature. At that point, additional n-BuLi was added (2.04 mL, 3.18 mmol). When the reaction appeared to be practically complete (by TLC), it was worked up as in Step 2 of Example 135. After flash chromatography (25% EtOAc:75% Hexanes), there yielded 850 mg, 59.4% of the amide as a yellow oil. 1H NMR (CDCl3) δ 1.25-1.40 (m, 8H); 1.40-1.64 (m, 5H); 2.37 (s, 12H); 2.57 (t, J=8.18 Hz, 2H); 3.25 (t, J=4.09 Hz, 2H); 3.36-3.47 (m, 4H); 6.06 (t, J=6.54 Hz, 1H); 7.02 (s, 2H); 7.11-7.19 (m, 4H); 7.20-7.48 (m, 5H); 7.69 (s, 2H).

Provenance & Evidence