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CAS No. : | 85416-73-5 | MDL No. : | MFCD03093861 |
Formula : | C16H21NO3 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | HJORMJIFDVBMOB-GFCCVEGCSA-N |
M.W : | 275.34 | Pubchem ID : | 158758 |
Synonyms : |
(+)-Rolipram
|
Chemical Name : | (S)-4-(3-(Cyclopentyloxy)-4-methoxyphenyl)pyrrolidin-2-one |
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | |
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 |
---|---|---|
78% | Stage #1: With hydrazine hydrate In tetrahydrofuran for 24 h; Inert atmosphere Stage #2: With triethylamine In toluene at 110℃; for 20 h; Inert atmosphere |
To a solution of 3an(0.2 mmol) in THF (10 mL) was added hydrazine hydrate (0.5 mL) and the solution was stirred for 24 h. After complete consumption of the starting material, the reaction mixture was extracted with dichloromethane and concentrated in vacuum, the residue was dissolved in a mixture of Et3N (0.6 mL) and toluene (3 mL) and the resultant solution heated at 110 °C for 20 h. After cooling to rt, the solvents were evaporated under reduced pressure. The residue was purified by flash chromatography (silica gel, ethyl acetate) to yield colorless crystals (78percent). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
87 % ee | With C33H32F6N4O3; sodium chloride In water; toluene at 20℃; for 24 h; | Thechiral catalyst 0.10 mmol shown in terms of the malonate 5.0 mmol shown interms of 3 - (cyclopentoxy) -4- methoxy phenyl night shown in terms of thechemical formula 2 in the alkyne 1.0 mmol, and the chemical formula 7, and thechemical formula 6 was stirred in the mixed solvent of the saturation sodiumchloride aqueous solution (saturated sodium chloride aqueous solution) 2.0 mLdepartment toluene 0.2 mL of 20 for 24 hours. Thereaction mixture the solvent was removed using the dichloromethane(CH(sub)2(/sub)Cl(sub)2(/sub)) solvent after doing the extraction under thereduced pressure and the product was separated after the stirring end using thecolumn chromatography and the chirality (R) - rolipram precursor was obtained(95percent yield). (R)- , (enantiomeric excess) (CHIRALCEL AD-H, 90:10,:, 210 nm, 1.0 ml/, t()=19.7, t()=42.2, 87percent ee, (R)-form). Themanufactured chirality (R) - rolipram precursor the enantiomeric excess wasmeasured using the high effectiveness liquid chromatography (the CHIRALCELAD-H, 90:10, hexane isopropyl alcohol, 210 nm, 1.0 ml /, T (major product)=19.7 minute, T (by-product) =42.2 minute, 87percent ee, (R) -form). |