HuagongsheHuagongshe Chemistry Print Report · For research reference only
Methyl 4-pentynoate → (Z)-5-[2,3-dihydro-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-5-nitro-2-oxo-1H-indol-4-yl]-4-pentynoic acid methyl ester
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Methyl 4-pentynoate | HCID 543061 | — |
| Reactant | (Z)-1,3-dihydro-4-bromo-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-5-nitro-2H-indol-2-one | HCID 18359293 | — |
| Catalyst | Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI) | HCID 24350 | — |
| Catalyst | HCID 178418476 | HCID 178418476 | — |
| Solvent | Dimethylformamide | HCID 6228 | — |
| Solvent | Triethylamine | HCID 8471 | — |
| Product | (Z)-5-[2,3-dihydro-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-5-nitro-2-oxo-1H-indol-4-yl]-4-pentynoic acid methyl ester | HCID 20667779 | — |
Reaction Steps
Using Method D above, methyl 4-pentynoate (0.18 g, 1.65 mmol) was coupled with (Z)-4-bromo-1,3-dihydro-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-5-nitro-2H-indol-2-one (Starting Material 1 supra) (0.3 g, 0.82 mmol) using (Ph3P)2PdCl2 (28.8 mg) and CuI (7.8 mg) as catalyst in DMF (8 mL) and Et3N (8 mL) as solvent at 85° C. for 18 h to yield (Z)-5-[2,3-dihydro-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-5-nitro-2-oxo-1H-indol-4-yl]-4-pentynoic acid methyl ester. (Yield 0.23 g, 72%).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US06303793B1 |
| Source dataset | uspto-grants-2001_10 |
| ORD ID | ord-bc01e9bd1f6b485a9ecfdeb4d9b89596 |
| Source note | uspto-grants-2001_10 |