反应详情

A solution of 400 mg (corresponds to 0.69 mmol) of crude trans-Methanesulfonic acid 4-{4-[(4-chloro-phenoxycarbonyl)-methyl-amino]-cyclohexyl}-but-3-ynyl ester in 4 ml of methanol was treated with 1.23 ml (6.88 mmol) Dimethylamine (33% in EtOH, 5.6M) and stirred over night at RT. The reaction was heated at 70° C. for 2 h, cooled, evaporated and the residue extracted with aqueous saturated NaHCO3/Et2O (3×). The organic phase was dried with Na2SO4, filtered and evaporated. Purification by flash column chromatography on silica gel (CH2Cl2/MeOH 99:1 to 9:1) gave 84 mg (34%) of trans-[4-(4-Dimethylamino-but-1-ynyl)-cyclohexyl]-methyl-carbamic acid 4-chloro-phenyl ester, MS: 363 (MH+, 1Cl).

1. temperatureThe reaction was heated at 70° C. for 2 h
2. temperaturecooled
3. customevaporated
4. extractionthe residue extracted with aqueous saturated NaHCO3/Et2O (3×)
5. dry with materialThe organic phase was dried with Na2SO4
6. filtrationfiltered
7. customevaporated
8. customPurification by flash column chromatography on silica gel (CH2Cl2/MeOH 99:1 to 9:1)