Methyl iodide → 2-[[N-(tert-butyloxycarbonyl)-N-methylamino]methyl]pyridine

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Reaction Steps

A solution of 19.8 g (95 mmol) of 2-(N-(t-butyloxycarbonyl)aminomethyl)-pyridine in anhydrous tetrahydrofuran was cooled under N2 atmosphere to 0° C. and treated with 4.95 g (124 mmol) of sodium hydride (60% dispersion in oil). The solution was stirred for 15 min, treated dropwise with 7.1 ml(114 mmol) of methyl iodide, stirred at ambient temperature for 2 h, and quenched cautiously with water. The resulting mixture was partitioned between ether and water, dried over Na2SO4, and concentrated in vacuo. Chromatography on silica gel provided 14.9 g (70%) of the desired compound as a colorless oil. 1H NMR (CDCl3) δ 1.43, 1.49 (two s, 9 H), 2.89, 2.94 (two s, 3 H), 4.54, 4.57 (two s, 2 H), 7.2 (m, 2 H), 7.67 (td, J=8, 2 Hz, 1 H), 8.55 (d, J=4 Hz, 1 H). Mass spectrum: (M+H)+ =223.

Provenance & Evidence