HuagongsheHuagongshe Chemistry Print Report · For research reference only
Ethylmorpholine → (S)-4-[6-Benzyloxy-2-(9H-fluoren-9-ylmethoxycarbonylamino)-hexanoyl]-piperazine-1-carboxylic acid butyl ester
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Ethylmorpholine | HCID 7525 | — |
| Reactant | O-[(Ethoxycarbonyl)cyanomethylenamino]-N,N,N',N'-tetramethyluronium tetrafluoroborate | HCID 2733286 | — |
| Reactant | Butyl piperazine-1-carboxylate | HCID 21963126 | — |
| Reactant | Fmoc-L-Nle(6-OBzl)-OH | HCID 51340560 | — |
| Solvent | Dimethylformamide | HCID 6228 | — |
| Solvent | Ethyl Acetate | HCID 8857 | — |
| Product | (S)-4-[6-Benzyloxy-2-(9H-fluoren-9-ylmethoxycarbonylamino)-hexanoyl]-piperazine-1-carboxylic acid butyl ester | HCID 66855348 | — |
Reaction Steps
To a solution of 500 mg (S)-6-Benzyloxy-2-(9H-fluoren-9-ylmethoxycarbonylamino)-hexanoic acid in 7 ml DMF were added at 0° C. 172 mg piperazine-1-carboxylic acid butyl ester hydrotrifluoroacetate, 0.14 ml N-ethylmorpholine and 357 mg TOTU. After stirring for 3 h the solution was diluted with ethyl acetate and subsequently washed with aqueous LiCl (4%) and half-saturated aqueous NaHCO3. The crude product obtained after evaporation of the solvent was used without further purification. Yield: 650 mg.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US08426420B2 |
| Source dataset | uspto-grants-2013_04 |
| ORD ID | ord-507517d246414ae8ba078126aae8a13a |
| Source note | uspto-grants-2013_04 |