HuagongsheHuagongshe Chemistry Print Report · For research reference only
4H-1-Benzopyran-2-carboxylic acid, 4-oxo-, methyl ester → Methyl 3,4-dihydro-2H-1-benzopyran-2-carboxylate
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | 4H-1-Benzopyran-2-carboxylic acid, 4-oxo-, methyl ester | HCID 29057 | — |
| Reactant | HCID 23567177 | HCID 23567177 | — |
| Catalyst | Palladium | HCID 23938 | — |
| Product | Methyl 3,4-dihydro-2H-1-benzopyran-2-carboxylate | HCID 14838439 | 93% |
Reaction Steps
Compound 3A was prepared by hydrogenation of the methyl 4-oxo-4H-chromene-2-carboxylate catalyzed by 10% Pd/C in 93% yield. MS: MS: 193 (M+1)+. Preparation of 6-Chlorosulfonyl-chroman-2-carboxylic acid methyl ester (Compound 3B)
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US06867224B2 |
| Source dataset | uspto-grants-2005_03 |
| ORD ID | ord-5eb2bf08cb4a45bc9e728fd87e6b006c |
| Source note | uspto-grants-2005_03 |