反应详情

温度

50 °C

To a suspension of 0.58 g (55% in mineral oil, 13 mmol, 1.2 eq) sodium hydride in 20 ml DMF, a solution of 4.2 g (11 mmol) trans-[4-(tert-Butyl-dimethyl-silanyloxy)-cyclohexyl]-carbamic acid benzyl ester in 10 ml DMF was added slowly. The temperature was raised slowly to 50° C. and kept at that temperature for 1 h. At RT 0.9 ml (14 mmol; 1.3 eq) iodomethane were added and the mixture stirred over night. Additional 0.58 g (55% in mineral oil, 13 mmol, 1.2 eq) sodium hydride and 0.9 ml (14 mmol; 1.3 eq) iodomethane were added and the reaction mixture was stirred for 1 day. Aqueous NH4Cl solution was added and the inorganic phase was extracted with ether, washed with brine, dried over Na2SO4 and evaporated yielding 3.1 g (72%) trans-[4-(tert-Butyl-dimethyl-silanyloxy)-cyclohexyl]-methyl-carbamic acid benzyl ester.

1. stirringthe reaction mixture was stirred for 1 day
2. extractionthe inorganic phase was extracted with ether
3. washwashed with brine
4. dry with materialdried over Na2SO4
5. customevaporated