Methanol → N-(3-Amino-2,2-dimethylpropyl)-1-amino-1,1-dimethyl-2-butanone oxime

関与物質

反応手順

To a solution of 2,2-dimethyl-1,3-propane diamine (69 g, 0.75 mole) in dry methanol (100 mL), 3-chloro-3-methyl-2-nitrosobutane (20.55 g, 0.15 mole, Example 1) was added in portions at 0° C. over a period of 2 hours. The reaction mixture was then stirred at room temperature for 20 hours. The solvent was removed under reduced pressure to give a paste. Water (50 mL) was added, and the solution was cooled in an ice bath. The solution was filtered and the filtrate was adjusted to pH 10-11 by the addition of sodium hydroxide. The solution was cooled again and filtered. The filtrate was concentrated under reduced pressure to a paste and then extracted with ether repeatedly (10×50 mL). The combined ether solution was concentrated to give an oil which was recrystallized twice from petroleum ether to yield the title A compound as a colorless crystalline solid (20.0 g), m.p. 58-60° C. 1H NMR [CDCl3]: δ 0.85 (s, 6H, C-Me2), 1.28 (s, 6H, N—CMe2), 1.9 (s, 3H, N═CMe), 2.2 (s, 2H, NCH2) and 2.6 (s, 2H, N—CH2).

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