HuagongsheHuagongshe Chemistry Print Report · For research reference only
4-Methylmorpholine → 1-[(R)-Isopropoxycarbonylamino-phenyl-acetyl]-pyrrolidine-2-(S)-carboxylic acid methyl ester
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | 4-Methylmorpholine | HCID 7972 | — |
| Reactant | methyl L-prolinate hydrochloride | HCID 2733200 | — |
| Reactant | O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate | HCID 2733207 | — |
| Reactant | (R)-Isopropoxycarbonylamino-phenyl-acetic acid | HCID 53741285 | — |
| Solvent | Water | HCID 962 | — |
| Solvent | Dimethylformamide | HCID 6228 | — |
| Product | 1-[(R)-Isopropoxycarbonylamino-phenyl-acetyl]-pyrrolidine-2-(S)-carboxylic acid methyl ester | HCID 54502406 | 91% |
Reaction Steps
A mixture of (R)-Isopropoxycarbonylamino-phenyl-acetic acid (0.74 g), (L)-proline methyl ester hydrochloride (0.51 g), N-methyl morpholine (1.00 mL) and 1.00 g of 2-(1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate (TBTU) in 10 mL of dry N,N-dimethyl formamide was stirred for 3 h at ambient temperature. The volatiles were pumped off and water was added followed by extraction with ethyl acetate and concentration of the organic layer. The remaining residue was purified by silica chromatography (ethyl acetatelisohexane=3/1) to give 0.95 g (91%) of the title compound as a colorless oil. (+)-APCI-MS: 349 (MH+).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US06432955B1 |
| Source dataset | uspto-grants-2002_08 |
| ORD ID | ord-886849a7fd884908986a9f7baeeea67d |
| Source note | uspto-grants-2002_08 |