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CAS No. : | 13374-30-6 | MDL No. : | MFCD09259963 |
Formula : | C6H14ClNO | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | LKKCSUHCVGCGFA-GEMLJDPKSA-N |
M.W : | 151.63 | Pubchem ID : | 11715205 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
5.86 g (96%) | With sodium hydrogencarbonate; In dichloromethane; | Step A (+-)-trans-2-(tert-Butoxycarbonylamino)-cyclohexanol To a vigoursly stirring solution of trans-2-aminocyclohexanol hydrochloride (5.5 g, 36 mmol) in 100 mL methylene chloride and saturated sodium bicarbonate solution (1:1) at 0 C. was added di-tert-butylcarbonate (13.09 g, 60 mmol). The resulting heterogeneous mixture was warmed to the room temperature and stirred overnight. The methylene chloride layer was washed with brine, dried and evaporated. The solid obtained was triturated with hexane and filtered to give 5.86 g (96%) of (+-)-trans-2-N-(tert-butoxycarbonyl)-cyclohexanol. 1 H NMR (500 MHz, CDCl3): delta4.61(brs, 1H), 3.27 (m, 1H), 2.73 (brs, 1H), 2.02-1.69 (m, 4H), 1,45 (s, 9H), 1.42-1.09(m, 4H). 13 C NMR (125 MHz, CDCl3): delta75.42, 56.62, 34.22, 31.84, 28.43, 27.48, 24.78, 24.11. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
88% | With triethylamine; In dichloromethane; at 20℃; for 2h; | To a stirred suspension of (lS,2S)-(+)-2-aminocyclohexanol hydrochloride (1.04 g, 6.86 mmol) in DCM (20 mL) was added triethylamine (2.39 mL, 17.1 mmol). A solution of di-tert-butyl dicarbonate (1.80 g, 8.23 mmol) in DCM (15 mL) was added dropwise. The reaction mixture was stirred at ambient temperature for 2 hours. The reaction was diluted with DCM and washed successively with IN HC1, saturated aqueous NaHCC"3 and brine, dried and concentrated. The residue was purified by column chromatography (hexane/EtOAc, 1 : 1) to give tert-butyl (l S,2S)-2- hydroxycyclohexylcarbamate (1.30 g, 88%). |
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