Aluminium lithium hydride → Methyl(2-(morpholin-4-yl)ethyl)amine

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反応条件

反応手順

Into a 250-mL 3-necked round-bottom flask, was placed a solution of LiAlH4 (7.72 g, 208.65 mmol, 3.00 equiv) in tetrahydrofuran (60 mL). This was followed by the addition of a solution of tert-butyl 2-morpholinoethylcarbamate (16 g, 62.61 mmol, 1.00 equiv, 90%) in tetrahydrofuran (40 mL) dropwise with stirring at 0-5° C. The resulting solution was stirred for 2 h at 70° C. in a oil bath. The reaction was then quenched by the addition of 7.7 mL of water, 7.7 mL of 15% sodium hydroxide, and 23.1 mL of water. The solids were filtered out. The mixture was dried over sodium sulfate and concentrated under vacuum. The residue was applied onto a silica gel column and eluted with dichloromethane:methanol (0.5% triethylamine) (20:1). This resulted in 4.2 g (42%) of N-methyl-2-morpholinoethanamine as brown oil.

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