反应详情

A 15% n-hexane solution (636 g.) of n-butyllithium was added to a solution of 2-amino-6-methylpyridin (64.8 g.) in tetrahydrofuran (500 ml.) at -20° to -30° C. over one hour, and stirred at -8° to -10° C. for 30 minutes. To the solution was added trimethylsilylchloride (161.7 g.) at -15° to -5° C. over 40 minutes, and the resultant solution was stirred at room temperature overnight. The solution was filtered through by a column packed with silica gel (180 g.), washed with tetrahydrofuran and then the filtrate was concentrated under reduced pressure. The residue was purified by fractional distillation to give a 2-[N,N-bis(trimethylsilyl)amino]-6-methylpyridine (117.6 g.), b.p. 95° to 97° C./5-6 mmHg.

1. filtrationThe solution was filtered through by a column
2. washwashed with tetrahydrofuran
3. concentrationthe filtrate was concentrated under reduced pressure
4. distillationThe residue was purified by fractional distillation