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CAS No. : | 225791-13-9 | MDL No. : | MFCD08704797 |
Formula : | C5H12ClNO | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | ZFSXKSSWYSZPGQ-JBUOLDKXSA-N |
M.W : | 137.61 | Pubchem ID : | 17039404 |
Synonyms : |
|
Chemical Name : | cis-(1S,2R)-2-Aminocyclopentanol Hydrochloride |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P280-P305+P351+P338-P310 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H332-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 |
---|---|---|
With hydrogenchloride; In methanol; ethanol; | C. Preparation of cis-2-aminocyclopentanol hydrochloride The 60.36 g of crude intermediate from Example 2B above were stirred with 566 ml of 10% hydrochloric acid solution at reflux for one hour. After cooling, the mixture was filtered and the filtrate was concentrated in vacuo. To the residue were added 200 ml of methanol and the mixture again concentrated in vacuo. Fifty milliliters of ethanol were added and the solution was placed in the refrigerator. The resulting precipitate was collected by filtration, washed with cold ethanol, and recrystallized from ethyl acetate/methanol to provide 20.18 g of the desired title intermediate, m.p. 182-184 C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60.3% | With N-ethyl-N,N-diisopropylamine; In dimethyl sulfoxide; at 100℃; for 3h; | A mixture of N-cyclopropyl-2-(2,5-dichloropyrimidin-4-yl)-l-(ethoxymethyl)-lH- indole-4-carboxamide (10 g, 25 mmol), (15',2i?)-2-aminocyclopentanol hydrochloride (4.1 g, 30 mmol) and DIPEA (5 mL, 30 mmol) in DMSO (70 mL) is stirred at 100 C for 3 h, then poured into water and extracted with EA. The combined extracts are washed with aqueous saturated sodium chloride, dried over Na2S04 and concentrated in vacuo. The residue is purified by chromatography on silica gel to give 2-{5-chloro-2-[(li?,25)-2- hydroxycyclopentylamino] pyrimidin-4-yl} -N-cyclopropyl- 1 -(ethoxymethyl)- lH-indole- 4-carboxamide (7 g, 60.3 %). MS (m/z): 470 (35C1) and 472 (37C1) (M+H)+ The above product (7 g, 14.9 mmol) is stirred with hydrogen chloride (6 M in methanol, 210 mL, 1.26 mol) at 45 C for 12 h. The precipitate is collected by filtration, washed with methanol and dried in vacuo to give the title compound (4.7 g, 70 %). MS (m z): 412 (35C1) and 414 (37C1) (M+H)+. |
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