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CAS No. : | 100858-32-0 | MDL No. : | MFCD07784363 |
Formula : | C12H15NO3 | Boiling Point : | - |
Linear Structure Formula : | (CH2)3NHCHOCO2CH2C6H5 | InChI Key : | MBLJFGOKYTZKMH-NSHDSACASA-N |
M.W : | 221.25 | Pubchem ID : | 13438604 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H317-H319 | 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 N-ethyl-N,N-diisopropylamine; In dichloromethane; at 0℃; for 1h; | Example M48: (R)-l-methylcyclopropyl 4-((5-(4-(pyrrolidin-3- ylsulfonyl)piperazin-l-yl)pyrazin-2-yloxy)methyl)piperidine-l-carboxylateCl M48a M48b M48c M48dStep E r M48e: R=Cbz^ Example M48: R=H <n="129"/>Step A: A solution of M48a (10 g, 45.2 mmol) in dichloromethane (200 mL) is cooled in an ice/water bath and treated with diisopropylethylamine (9.4 mL, 54.3 mmol) followed by dropwise addition of methanesulfonyl chloride (3.8 mL, 50 mmol). The resulting solution is stirred at 0 0C for 1 hour, concentrated and purified on silica gel using a linear gradient of 0-100% ethyl acetate in hexane to afford M48b; ESIMS m/z for (M+H)+ C13H18NO5S calcd: 300.1, found: 300.0. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
92% | With triethylamine; In dichloromethane; at 5 - 20℃; for 48h; | Step 1: preparation of benzyl (3S)-3-hydroxypyrrolidine-1-carboxylate. A solution of (3S)-pyrrolidin-3-ol (10.0 g, 0.12 mol) in dichloromethane (130 mL) was cooled to 5C. Triethylamine (16.9 mL, 0.12 mol) was added, followed by drop wise addition ofbenzyl chloroformate (13.9 mL, 0.10 mol), ensuring that the temperature did not exceed5C. The reaction mixture was then allowed to stir at ambient temperature for 48h, after which it was poured into aqueous saturated sodium bicarbonate and extracted into dichloromethane. The combined organic layers were washed with aqueous saturated sodium bicarbonate, dried over magnesium sulfate, and concentrated in vacuo. The resulting crude oil was purified by silica gel column chromatography (50% ether hexanes followed by ether) to afford the title compound as a clear oil (14 g, 92%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium hydroxide; water; In ethanol; for 0.25h; | To a 20-L, three neck round bottom flask containing 427 g (1.62 mol) of benzyl (3S)-3-ACETOXYPYRROLIDINE-1-CARBOXYLATE was added 4 L of absolute ethanol followed by 101 g (1.57 mol) of potassium hydroxide in about 400 ML of water. After about 15 min, the reaction mixture was poured into 8 L of water and extracted with 8 L of ethyl acetate. The aqueous layer was then extracted with an additional 4 L of ethyl acetate. The combined organics were washed with saturated aqueous brine, dried over magnesium sulfate and concentrated to a thick oil and solids. | |
With potassium hydroxide; ethanol; water; for 0.25h; | Step B: Benzyl (3S)-3-hydroxypyrrolidine-l-carboxylate; To a 20-L, three neck round bottom flask containing 427 g (1.62 mol) of benzyl (3S)-3- acetoxypyrrolidine-1-carboxylate was added 4 L of absolute ethanol followed by 101 g (1.57 mol) of potassium hydroxide in about 400 mL of water. After about 15 min, the reaction mixture was poured into 8 L of water and extracted with 8 L of ethyl acetate. The aqueous layer was then extracted with an additional 4 L of ethyl acetate. The combined organics were washed with saturated aqueous brine, dried over magnesium sulfate and concentrated to a thick oil and solids. | |
With potassium hydroxide; ethanol; water; for 0.25h; | To a 20-L, three neck round bottom flask containing 427 g (1.62 mol) of benzyl (3S)-3- acetoxypyrrolidine-1-carboxylate was added 4 L of absolute ethanol followed by 101 g (1.57 mol) of potassium hydroxide in about 400 mL of water. After about 15 min, the reaction mixture was poured into 8 L of water and extracted with 8 L of ethyl acetate. The aqueous layer was then extracted with an additional 4 L of ethyl acetate. The combined organics were washed with saturated aqueous brine, dried over magnesium sulfate and concentrated to a thick oil and solids. |
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