[CH3:1][NH:2][C:3]([CH3:6])([CH3:5])[CH3:4].C(N(CC)CC)C.[C:14](Cl)(=[O:21])[C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1>O1CCCC1>[CH3:1][N:2]([C:3]([CH3:6])([CH3:5])[CH3:4])[C:14](=[O:21])[C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1Under nitrogen, 96.7 g (1.1 mol) of N-methyl-N-tertbutylamine and 111 g (1.1 mol) of triethylamine was dissolved in 1050 mL of anhydrous tetrahydrofuran (THF). The solution was cooled to 0° C. and treated with 140.6 g (1.0 mol) of benzoyl chloride. The reaction was allowed to slowly warm to ambient temperature and stir overnight. Filtration and subsequent concentration in vacuo of the filtrate gave the crude product which was purified by sublimation (65°, 0.2 torr) to give 184 g (96%) of colorless N-methyl-N-tertbutybenzamide: mp 80.5°-82.0° C.; NMR (CDCl3) δ1.52 (s, 9H), 2.87 (s, 3H), 7.34-7.40 (m, 3H), 7.40-7.46 (m, 2H).
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