反应详情

16.2 g (62.95 mmol) of trans-4-tert-butoxy carbonylamino-cyclohexanecarboxylic acid methyl ester and 5.87 mL (94.43 mmol, 1.5 eq) of methyl iodide in 100 ml DMF were treated under stirring and ice-cooling with 3.57 g (81.84 mmol, 1.3 eq) of NaH (55% in oil). The solution was stirred at RT for 20 h and then treated under ice-cooling with 1M HCl. The reaction mixture was dissolved in ether and washed 4 times with water. The ether-phases were concentrated under reduced pressure to yield 17.5 g (quantitative) of trans-4-(tert-butoxycarbonyl-methyl-amino)-cyclohexanecarboxylic acid methyl ester, MS: 201 (M−OC4H9).

1. stirringThe solution was stirred at RT for 20 h
2. additiontreated under ice-
3. washwashed 4 times with water
4. concentrationThe ether-phases were concentrated under reduced pressure