反应详情

温度

0 °C

To a solution of LAH (0.62 mg, 16.30 mmol) in anhydrous ether (100 ml) was added N-(tert-butoxycarbonyl)--N-(2-cyanoethyl)-N',N'-dimethyl-1,4-diaminobutane 324 (2.22 g, 8.10 mmol) in anhydrous ether (50 ml) at 0° C. The mixture was stirred at 0° C. for thirty minutes. The excess LAH was quenched with 1N NaOH at 0° C., and the resulting suspension was filtered through Celite and washed with ether. The combined ether layers were washed with brine, dried over MgSO4, and concentrated in vacuo to yield a crude product. The crude product was purified on a flash silica gel column and eluted with chloroform:methanol:isopropylamine (15:1:1) to give N-(3-aminopropyl)--N-(tert-butoxycarbonyl)-N',N'-dimethyl-1,4-diaminobutane 325 (1.30 g, 59% yield). 1H NMR (400 MHz, CDCl3) δ: 1.40 (9H, s, t-Bu), 2.15 (6H, s, --N(CH3)2), 2.22 (2H, m), 2.65 (2H, t), 3.20 (4H, m).

1. customThe excess LAH was quenched with 1N NaOH at 0° C.
2. filtrationthe resulting suspension was filtered through Celite
3. washwashed with ether
4. washThe combined ether layers were washed with brine
5. dry with materialdried over MgSO4
6. concentrationconcentrated in vacuo
7. customto yield a crude product
8. customThe crude product was purified on a flash silica gel column
9. washeluted with chloroform:methanol:isopropylamine (15:1:1)