HuagongsheHuagongshe Chemistry Print Report · For research reference only
Carbon Dioxide → L-Proline 1,1-dimethylethyl ester
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Carbon Dioxide | HCID 280 | — |
| Reactant | 2-(1,1-Dimethylethyl) 1-(phenylmethyl) (2S)-1,2-pyrrolidinedicarboxylate | HCID 7019799 | — |
| Reactant | HCID 178418361 | HCID 178418361 | — |
| Catalyst | Palladium | HCID 23938 | — |
| Solvent | Ethanol | HCID 702 | — |
| Product | L-Proline 1,1-dimethylethyl ester | HCID 6453108 | — |
Reaction Steps
Benzyloxycarbonyl-L-proline tert.butyl ester (205 g.) is dissolved in absolute ethanol (1.2 l) and hydrogenated at normal pressure with 10% Pd on carbon (10 g.) until only a trace of carbon dioxide is observed in the hydrogen exit gas (24 hours). The catalyst is filtered off and the filtrate is concentrated in vacuo at 30 mm. Hg. The residue is distilled in vacuo, to obtain L-proline tert.butyl ester, b.p.1mm 50°-51°.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04046889 |
| Source dataset | uspto-grants-1977_09 |
| ORD ID | ord-ede5c4a46a964843b654ebdc06786bf1 |
| Source note | uspto-grants-1977_09 |